WO1987003103A1 - Light-shielding device - Google Patents
Light-shielding device Download PDFInfo
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- WO1987003103A1 WO1987003103A1 PCT/JP1986/000575 JP8600575W WO8703103A1 WO 1987003103 A1 WO1987003103 A1 WO 1987003103A1 JP 8600575 W JP8600575 W JP 8600575W WO 8703103 A1 WO8703103 A1 WO 8703103A1
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- WIPO (PCT)
- Prior art keywords
- light
- shielding device
- shielding
- intensity
- effect
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
- A61F9/06—Masks, shields or hoods for welders
- A61F9/065—Masks, shields or hoods for welders use of particular optical filters
- A61F9/067—Masks, shields or hoods for welders use of particular optical filters with variable transmission
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/101—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having an electro-optical light valve
Definitions
- the human eyeball automatically enlarges the pupil according to the degree of brightness around it (hereinafter referred to as illuminance) .9) It has the effect of reducing the size (pupil diffusion) and the effect of protecting the optic nerve. In addition, it has the physiological effect of making the subject more visible.
- the effect on the optic nerve is so large that it may cause a blind phenomenon in which objects become invisible for a moment.
- the phenomenon is that when you enter the tunnel from a light road while driving, or enter a cinema that is light and dark, you will be able to see the surroundings for a moment. Many people must have experienced this.
- the light-shielding device is activated by an energizing action to change the transmittance of light, and is not only a fool for protecting eyes but also the safety in life by changing the purpose of use.
- the purpose is to not only establish the fool, but also to make life easier.
- Fig. 1 illustrates the principle of the present invention.
- the light is sensed by the light sensing system, the brightness of the light (illuminance) is detected, and an electrical change is generated.
- An electric signal giving a predetermined change in illuminance in the circuit is used to power the light-shielding material and drive the light-shielding device.
- This is a power source, and this power source depends on the purpose of use. It can be used for batteries, solar cells, vehicles, ships, aircraft, and other types of electricity.
- 5 is a switch circuit], used when ⁇ ⁇ OFF action is required depending on the purpose of use. In the simplest case of this device, the light-shielding effect can be exhibited by using solar cells for 12345. The form of i3 ⁇ 4 to provoke a framing
- Light-shielding materials include photo glass, photo plastic, liquid crystal, liquid crystal sheet, and light control. Use materials that are suitable for the intended use, such as plastic finolems, electric chromics, etc., and join them with materials such as glass and plastic. That you use.
- the illuminance of the sunlight is clear, finished, cloudy, rainy, snowy, and other weather changes, morning, daytime, evening, and other time changes, spring, summer, autumn and winter seasonal changes, sunshine, shade, outdoors, Generally, the maximum is around 100,000 Knox, and the minimum is around 200 Lux, depending on the conditions of the measuring place. It is considered.
- the purpose of the present invention is to determine the light-shielding rate suitable for the intended use of this sunlight, and to transmit light optimally to the eyes.
- a light-sensing system As a light-sensing system, a commonly used illuminometer is used, and a system that changes the brightness into an electric signal (digital signal) is used. .
- a lens for glasses using a photomix effect for glass or plastic has been commercially available as a light control lens.] However, this lens does not only respond slowly to light, but the response time becomes slower if the lens is used for a long time.] The transparency of the lens itself is poor.
- problems such as the fact that the color is always darkened and that the light is not directly applied (even indoors), resulting in a dimming effect. This is due to the action of light]? It utilizes the photochromic effect that causes a chemical change, but the speed of reacting in real time to the environment and the purpose of use Is due to inadequate support at the moment.]
- the light shielding effect is adjusted not by the light blocking caused by the photo-mouth mix but by the electric energy to adjust the speed and the transmittance of light to meet the desired needs. What you do] 9.
- the light-shielding device of the present invention When used as eyeglasses, if the light-shielding device of the present invention is used for a lens, it will be large as a glass. Effective! ), It is certain that it will be the driver's necessities. Also, by making the lens more prescription for correction], it is possible to process it for myopia, hyperopia, and astigmatism.], And the range of use as a sunglass is expanded. J will be.
- FIG. 1 illustrates the principle of the present invention.
- 1 is a sensing system
- 2 is a control circuit
- 3 is a power supply
- 4 is a light shielding material
- 5 is a switch circuit.
- FIG. 2 is a cross-sectional view in which the light-shielding device of the present invention is set in a lens in an eyeglass frame.
- a solar cell is set in the center of the frame. 1 is a solar cell, 2 is an electrode, 3 is a conductor, and 4 is a lens with a light shielding device.
- the light-shielding device of the present invention can be used for industrial protection glasses for sunglasses, welding, etc., visors for various helmets, goggles, automobiles, window glasses for train vehicles, window glasses for ships, and aircrafts. Window glass, architectural window glass, decorative goods, etc., are used in a wide variety of fields.]? It is a product with great social needs, and is expected to have great expectations from various fields. 9 The invention's effect
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Vascular Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
This invention relates to a device for protecting naked eyes from an intense incident light, and its object is to maintain safety in everyday life. According to this invention, the intensity of an incident light is detected by a light sensing system (1) and the detected intensity is transmitted to a control circuit (2), which controls a power source (3) so that an electric current is supplied to a light-shielding member (4) in response to electric signals that change depending upon the intensity of the light, to thereby control the transmissivity of the light.
Description
明 細 書 Specification
遮 光 装 置 Light shielding device
技 術 分 野 Technical field
人間の眼球は、 周囲の明かるさの度合 （ 以下照 度という。） によって自動的に瞳孔を大き く した ]9、 小さ く した する作用 （ 瞳孔拡散作用 ） があ 、 視神経に対する保護作用と と もに被視体を見やす くする効果を生理的に行う ものであ ]9ます。 The human eyeball automatically enlarges the pupil according to the degree of brightness around it (hereinafter referred to as illuminance) .9) It has the effect of reducing the size (pupil diffusion) and the effect of protecting the optic nerve. In addition, it has the physiological effect of making the subject more visible.
照度格差が大きい場合には、 視神経に対する影 響は大き く 一瞬、 物が見えな く なる という 盲目現 象を生じる こと もあ j ます。 この現象は、 車の ド ラ ィ ブ中に明かるい道路から ト ン ネ ル内に入った 時、 又、 明かるい厘間暗い映画館に入った時、 一 瞬、 周囲が見え ¾ く なる という ことを多 くの人が 体験されたはずです。 If the illuminance disparity is large, the effect on the optic nerve is so large that it may cause a blind phenomenon in which objects become invisible for a moment. The phenomenon is that when you enter the tunnel from a light road while driving, or enter a cinema that is light and dark, you will be able to see the surroundings for a moment. Many people must have experienced this.
この様な場合、 本発明の遮光装置を利用した眼 鏡を使用する ことによ ]?、 周辺の環境における照 度によ って眼鏡レ ンズが光を透過する光量を調整 する効果によ ]?、 この一瞬物が見え ¾ く ¾るとい う 盲目現象から解放されることにな 、 眼の保護
ばか ]?でな く モータ リ ゼィ シ ョ ンにおける交通安 全対策の大き ¾一助になる ものと確信してお ]) ま す。 In such a case, an eyeglass using the light-shielding device of the present invention is used], and the effect of adjusting the amount of light transmitted through the spectacle lens by the illuminance in the surrounding environment is obtained. ?, This moment you will be released from the blinding phenomenon that you can see things, eye protection I'm convinced that it will be a great help for traffic safety measures in motorization instead of fools].
本発明は、 従来球面状態に電極を均一に表面加工 して張る ことはできないものであ！）ま した。 これ を一歩進めて球面状態に透明電極を表面加工する ことができ るよ うに ¾ 、 自動車用窓ガラ ス ど の球面状態のものに対して遮光素材をパ ッ キ ング することが可能と ま した。
According to the present invention, it is impossible to uniformly surface-treat an electrode in a conventional spherical state and to stretch the electrode! ) By taking this step one step further, it is now possible to pack a light-shielding material on a spherical surface such as an automotive window glass so that the transparent electrode can be surface-processed into a spherical surface. .
発 明 の 開 示 Disclosure of the invention
本発明は、 通電作用によ って遮光装置が作動し 光の透過率を変化させる ものであ 、 眼を保護す るばか でな く、 使用目的を変える こ とによ って 生活における安全性を確立するばか で く、 生 活に至便さをあたえる ことを目的とする ものであ ます。 According to the present invention, the light-shielding device is activated by an energizing action to change the transmittance of light, and is not only a fool for protecting eyes but also the safety in life by changing the purpose of use. The purpose is to not only establish the fool, but also to make life easier.
本発明の実施原理を第 1 図で説明 します。 Fig. 1 illustrates the principle of the present invention.
第 1 図に示す様に①光感知シス テ ム によ って感知 し、 光の明かるさ （ 照度 ） を検出 して、 電気的変 化を発生させ、 ②制御回路へ伝達し、 その制御回 路であ らかじめ定められた照度変化をあたえる電 気信号によ って④遮光素材へ通電させ遮光装置を 駆動させる為の③電源であ ] 、 この電源は、 使用 目的によ ] 、 電池、 太陽電池、 車両、 船舶、 航空 機等の電気等々が利用でき ます。 ⑤はス ィ ッ チ回 路であ ]?、 使用目的によ って ΟΝ · O F F作用を必要 とする場合に使用します。 本装置で最も簡単な も のでは、 ①②③④⑤を太陽電池にする ことによ つ て遮光効果を発揮させる こと もでき ます。
発叨を突施するための i¾ の形態 As shown in Fig. 1, the light is sensed by the light sensing system, the brightness of the light (illuminance) is detected, and an electrical change is generated. An electric signal giving a predetermined change in illuminance in the circuit is used to power the light-shielding material and drive the light-shielding device. This is a power source, and this power source depends on the purpose of use. It can be used for batteries, solar cells, vehicles, ships, aircraft, and other types of electricity. ⑤ is a switch circuit], used when 場合 · OFF action is required depending on the purpose of use. In the simplest case of this device, the light-shielding effect can be exhibited by using solar cells for ①②③④⑤. The form of i¾ to provoke a framing
遮光素材と しては、 フ ォ ト ミ ッ ク ガラ ス、 フ ォ ト ミ ッ ク プラ ス チ ッ ク 、 液晶、 液晶 シー ト 、 調光 フ。ラ ス チ ッ ク フ イ ノレム 、 エ レク. ト ロ ク ロ ミ ッ ク等 等その目的用途に適合させた素材を使用し、 それ 自体及びガラ ス、 プラ ス チ ッ ク等の材料と接合さ せ使用する も のであ ] ます。 Light-shielding materials include photo glass, photo plastic, liquid crystal, liquid crystal sheet, and light control. Use materials that are suitable for the intended use, such as plastic finolems, electric chromics, etc., and join them with materials such as glass and plastic. That you use.
太陽光の照度は、 快晴、 睛、 曇、 雨、 雪等の天 候の変化、 朝、 日 中、 夕方等の時間の変化、 春夏 秋冬の季節の変化、 日 た、 日影、 屋外、 屋内等 等によ って異な ] ますが、 一般的には最高は、 1 0 0, 0 0 0 ノレッ クス前後であ j 最低は、 測定場所 の条件にはよる力 2 0 0 ルッ クス 前後と考えられ てお ます。 この太陽光を使用目的に適合した遮 光率を定めて、 眼に最適 ¾光の透過を行わせるの が本発明の目的であ ます。 The illuminance of the sunlight is clear, finished, cloudy, rainy, snowy, and other weather changes, morning, daytime, evening, and other time changes, spring, summer, autumn and winter seasonal changes, sunshine, shade, outdoors, Generally, the maximum is around 100,000 Knox, and the minimum is around 200 Lux, depending on the conditions of the measuring place. It is considered. The purpose of the present invention is to determine the light-shielding rate suitable for the intended use of this sunlight, and to transmit light optimally to the eyes.
光感知シ ス テ ム と しては、 一般に使用されてい る照度計を使用し、 それによ つて明かるさを電気 信号 （ デ ジタ ル信号 ） に変化される シ ス テ ムを使 用します。
遮光素材と しては、 従来、 フ ォ ト ミ ッ ク ス効果 をガラ ス も し くはプラ ス チ ッ ク に利用した眼鏡用 レ ンズが調光レ ンズと して市販されてお ] ますが、 この調光レ ンズは光に対しての反応速度が遅いば か ] でな く、 新調して永く 使用しているとその反 応速度は増々遅く な ] 、 レ ンズ自体の透明度が悪 く ¾ 、 常に色が濃く ついている様になるばか でる く 、 光が直接あたらない場合 （ 室内において も ） 調光作用を生じてしま う等の問題点が数多 く あ ]?ま した。 これは光の作用によ ]? 化学変化を生 じさせる フ ォ ト ク ロ ミ ッ ク効果を利用したもので あ ] ますが、 環境、 使用目的に対して リアルタイム に反応をさせるという ス ピー ドには、 現在、 十分 に対応出来ないことによ る ものであ ] ます。 As a light-sensing system, a commonly used illuminometer is used, and a system that changes the brightness into an electric signal (digital signal) is used. . Conventionally, as a light-blocking material, a lens for glasses using a photomix effect for glass or plastic has been commercially available as a light control lens.] However, this lens does not only respond slowly to light, but the response time becomes slower if the lens is used for a long time.] The transparency of the lens itself is poor. However, there are many problems such as the fact that the color is always darkened and that the light is not directly applied (even indoors), resulting in a dimming effect. This is due to the action of light]? It utilizes the photochromic effect that causes a chemical change, but the speed of reacting in real time to the environment and the purpose of use Is due to inadequate support at the moment.]
本発明は、 これらのフ ォ ト ク 口 ミ ッ ク によ って 生じる遮光ではな く、 遮光作用を電気的エネルギ —によ って目的ニーズに適合したス ピー ド及び光 の透過率調整を行う も のであ ]9ます。 According to the present invention, the light shielding effect is adjusted not by the light blocking caused by the photo-mouth mix but by the electric energy to adjust the speed and the transmittance of light to meet the desired needs. What you do] 9.
眼鏡と して利用した場合には、 本発明の遮光装 置をレ ン ズに使用すればサ ングラ ス と して大き な
効果があ！）、 ドラ イバ一の必需品とるることは確 実であ ]) ます。 又、 レ ン ズを矯正用に度付きにす ることによ ] 、 近視、 遠視、 乱視用に加工する こ と も十分可能であ ]? 、 サ ングラ ス と しての使用範 囲も拡大されることにな J ます。 When used as eyeglasses, if the light-shielding device of the present invention is used for a lens, it will be large as a glass. Effective! ), It is certain that it will be the driver's necessities. Also, by making the lens more prescription for correction], it is possible to process it for myopia, hyperopia, and astigmatism.], And the range of use as a sunglass is expanded. J will be.
眼鏡フ レームに太陽電池をセット する ことによ )、 通電効果を発揮させ、 周囲の明かるさによ って レ ンズの光の透過率を変化させるものであ ]?ます。 太陽電池の発電能力によ ]9 、 フ レ ー ム の中心にセ ッ トする場合や、 フ レ ー ム の上部に一連にセ ッ ト する場合、 目的によ っては、 フ レー ムのつるの中 に電池をセ ッ トする方法とか、 使用目的と求める 性能に合せた方法が採用できます。 ゴーグル、 へ ルメ ッ ト用バイザ一でも同様の方法をとる もので あ ] ます。 使用目的によ って、 太陽電池、 電池を 利用するのではな く、 外部よ ]?電気を導入する方 法もあ ]9、 又、 反応精度を正確にする為に光セ ン サー、 制御回路を組込むことによ ] 高性能な もの を製作する こと も出来ます。
図面の簡単 ¾説明 By placing a solar cell in the eyeglass frame), the effect of energization is exhibited, and the light transmittance of the lens is changed depending on the surrounding brightness. Depending on the power generation capacity of the solar cell] 9, depending on the purpose, depending on the purpose, when setting in the center of the frame or in a series at the top of the frame You can set the battery in the vine or use the method that suits the purpose of use and required performance. Goggles and visors for helmets use the same method. Depending on the purpose of use, instead of using solar cells or batteries, there is also a method of introducing electricity outside.] 9 There are also optical sensors and controls to make the reaction accuracy accurate. By incorporating a circuit], high-performance products can also be manufactured. Brief description of drawings
第 1 図は、 本発明の原理である。 FIG. 1 illustrates the principle of the present invention.
①は感知シ ス テ ム 、 ②は制御回路、 ③は電源、 ④は遮光素材、 ⑤はス ィ ツ チ回路である。 ① is a sensing system, ② is a control circuit, ③ is a power supply, ④ is a light shielding material, and ⑤ is a switch circuit.
第 2 図は、 眼鏡フ レー ム に本発明の遮光装置を レ ン ズにセ ッ ト した断面図である。 FIG. 2 is a cross-sectional view in which the light-shielding device of the present invention is set in a lens in an eyeglass frame.
太陽電池がフ レ ー ム の中心にセ ッ ト したものであ 、 ①は太陽電池、 ②は電極、 ③は導線、 ④は遮 光装置付レ ン ズである。 産業上の利用可能性 A solar cell is set in the center of the frame. ① is a solar cell, ② is an electrode, ③ is a conductor, and ④ is a lens with a light shielding device. Industrial applicability
本発明の遮光装置は、 サ ン グラ ス 、 溶接用等の 産業用保護メ ガネ、 各種ヘルメ ッ ト用バ イザ一、 ゴーグノレ、 自動車 ， 列車車両の窓ガラ ス、 船舶用 窓ガラ ス 、 航空機用窓ガ ラ ス、 建築用窓ガラ ス 、 装飾用品等々その使用使途は各方面多岐にわた ]? 社会的ニ ー ズの大き る商品であ 、 各方面から大 き な期待が寄せられてお ]9ます。
発 明 の 効 果 INDUSTRIAL APPLICABILITY The light-shielding device of the present invention can be used for industrial protection glasses for sunglasses, welding, etc., visors for various helmets, goggles, automobiles, window glasses for train vehicles, window glasses for ships, and aircrafts. Window glass, architectural window glass, decorative goods, etc., are used in a wide variety of fields.]? It is a product with great social needs, and is expected to have great expectations from various fields. 9 The invention's effect
車両、 船舶、 航空機用については、 それ自体が 電気を使用しているので、 ス ィ ッ チ操作も しく は 光センサ—、 制御回路を組込むことによ ]?、 使用目 的に適合させた自動調整作用の遮光装置とする こ と も可能であ ます。 これによ ]?、 従来カ ー テ ン で遮光していたものが、 本発明を利用すればカ ー テ ンが不要と ます。 For vehicles, ships, and aircraft, they use electricity themselves, so switch operation or optical sensors or by incorporating control circuits]? It can also be used as a light blocking device for adjustment. Due to this, what was conventionally shielded from light by a curtain is eliminated by using the present invention.
建築材料と して使用すれば、 同様の効果が期待 でき ブラ イ ン ド、 カ ー テ ンが不要とな ]?ます。 本発明の遮光装置と偏光子をセ ッ ト して使用する ことによ ]?、 よ 効果的な遮光効果を発揮させる ばか！）で く 、 光の方向によ ってはよ 効果的な 光の調整を行う こと もできます。
If used as a building material, similar effects can be expected, and blinds and curtains are not required. By using the light-shielding device and the polarizer of the present invention in a set], a more effective light-shielding effect can be achieved! ), But depending on the direction of the light, a more effective light adjustment can be performed.
Claims
(1) 通電作用によ 明かるさが変化する遮光装置 を有する眼鏡。 (1) Eyeglasses having a light-blocking device whose brightness changes due to an energizing action.
(2) 通電作用によ ]?明かるさが変化する遮光装置 を有するゴー グル。 (2) Goggles with a light-shielding device whose brightness changes depending on the energizing action.
(3) 通電作用によ ])明かるさが変化する遮光装置 を有するヘルメ ッ ト用パイザ一。 (3) Due to energizing action]) A helmet paiser having a light-shielding device that changes brightness.
(4) 通電作用によ 明かるさが変化する遮光装置 を有する車両、 船舶、 航空機用窓ガラ ス用素材。 (4) Window glass materials for vehicles, ships, and aircraft that have light-blocking devices whose brightness changes due to energization.
(5) 通電作用によ 明かるさが変化する遮光装置 を利用して製作する建築用素材。 (5) Architectural materials manufactured using light-blocking devices whose brightness changes due to energization.
(6) 球面状態に透明電極を表面加工し、 球面状態 の素材に対して応用でき る遮光装置。
(6) A light-shielding device that can be applied to materials with a spherical surface by processing the surface of the transparent electrode into a spherical surface.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25155185 | 1985-11-09 | ||
| JP60/251551 | 1985-11-09 | ||
| JP26537185 | 1985-11-26 | ||
| JP60/265371 | 1985-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1987003103A1 true WO1987003103A1 (en) | 1987-05-21 |
Family
ID=26540240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1986/000575 WO1987003103A1 (en) | 1985-11-09 | 1986-11-10 | Light-shielding device |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1987003103A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51146249A (en) * | 1975-06-07 | 1976-12-15 | Dainippon Toryo Co Ltd | Liquid crystal glasses |
| JPS52143849A (en) * | 1976-05-26 | 1977-11-30 | Nitto Kohki Co | Goggles for welding |
| JPS5542777U (en) * | 1978-09-15 | 1980-03-19 | ||
| JPS55102717A (en) * | 1979-02-01 | 1980-08-06 | Seiko Epson Corp | Anti-dazzling device |
| US4279474A (en) * | 1980-03-25 | 1981-07-21 | Belgorod Barry M | Spectacle lens having continuously variable controlled density and fast response time |
-
1986
- 1986-11-10 WO PCT/JP1986/000575 patent/WO1987003103A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51146249A (en) * | 1975-06-07 | 1976-12-15 | Dainippon Toryo Co Ltd | Liquid crystal glasses |
| JPS52143849A (en) * | 1976-05-26 | 1977-11-30 | Nitto Kohki Co | Goggles for welding |
| JPS5542777U (en) * | 1978-09-15 | 1980-03-19 | ||
| JPS55102717A (en) * | 1979-02-01 | 1980-08-06 | Seiko Epson Corp | Anti-dazzling device |
| US4279474A (en) * | 1980-03-25 | 1981-07-21 | Belgorod Barry M | Spectacle lens having continuously variable controlled density and fast response time |
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