WO1994007159A1 - Farbstichkompensationsfilter für optische geräte mit beobachtungs- und fotostrahlengang - Google Patents
Farbstichkompensationsfilter für optische geräte mit beobachtungs- und fotostrahlengang Download PDFInfo
- Publication number
- WO1994007159A1 WO1994007159A1 PCT/DE1993/000867 DE9300867W WO9407159A1 WO 1994007159 A1 WO1994007159 A1 WO 1994007159A1 DE 9300867 W DE9300867 W DE 9300867W WO 9407159 A1 WO9407159 A1 WO 9407159A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refractive index
- color cast
- filter layer
- interference filter
- filter according
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
Definitions
- Color cast compensation filter for optical devices with observation and photo beam path
- the invention relates to a color cast compensation filter for optical devices with observation and photo beam path, in particular for microscopes.
- complex optical devices which, in addition to an actual observation beam path, also have a photo beam path, among other things, it may be necessary to correct color distortions caused by the spectral profiles of the optical components used, in conjunction with the weighting of the color sensitivity of the film material. arise.
- Different color falsifications can occur in the partial beam path, which is directed towards the observer (observation beam path), than in the partial beam path, which is used for registration (photo beam path).
- Such a case involves the correction or compensation of a combination color cast error.
- the figure shows the spectral profile of the interference filter layer system according to the invention.
- a wide, trough-shaped saddle between 470 nm and 580 nm can be seen in the green area. This area with a defined transmission reduction symbolizes the course that weakens the color green and is responsible for correcting the greenness.
- the layer structure is given in the table below:
- Sub-layer no. 17 is on the glass substrate with a refractive index n- between 1.52 and 1.9.
- the angle of incidence can be between 0 ° and + 10 °.
- This is a material from the zirconium dioxide group Hafnium (IV) oxide (Hf0 2 ) or from a mixture of metal oxides and rare earth oxides.
- MgF 2 magnesium fluoride
- the intensity of the light is changed in a defined manner for different wavelength ranges, so that, for example, the micro-photographs lead to a color-neutral reproduction of the microscoped objects and additionally also a visual insight into a microscope shows neutral color image.
- the interference filter layer is applied to a glass surface that has not yet been provided with another functional layer. This is the case, for example, with a diffusing screen which is arranged in the illuminating beam path of the optical device.
- the interference filter layer presented here can be applied to both sides of the lens; However, it is expedient to provide them on the uneven, flat side.
- the lens is vertical in the beam path. This arrangement, which is conventional per se, simplifies the proposed layer sequence.
- Another advantage is that a diffusing screen is easily accessible in comparison to other optical components, so that installation and removal means only a small adjustment effort. This makes it possible to make color cast corrections subsequently, without having to make a major intervention in the overall arrangement of all optical components.
- the lens thus also has an additional function, so that an additional substrate carrier for the interference filter layer is unnecessary.
- the lens is located in the illumination beam path, in front of the aperture diaphragm (on the lamp side).
- the situation is largely irrelevant for the interference filter layer. It is only important that the interference filter layer sits in the illumination beam path, since the light that is not transmitted through the interference filter layer is essentially reflected. It is within the scope of the present invention to allow a variation range of ⁇ 5% in the optical thicknesses specified in the table and in the claim.
- the interference filter layer is produced by vapor deposition in a high vacuum.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93919003A EP0613563B1 (de) | 1992-09-18 | 1993-09-15 | Farbstichkompensationsfilter für optische geräte mit beobachtungs- und fotostrahlengang |
DE59307174T DE59307174D1 (de) | 1992-09-18 | 1993-09-15 | Farbstichkompensationsfilter für optische geräte mit beobachtungs- und fotostrahlengang |
JP50768494A JP3355188B2 (ja) | 1992-09-18 | 1993-09-15 | 観察光路および写真光路を有する光学機器の色調補償フイルタ |
US08/244,054 US5625492A (en) | 1992-09-18 | 1993-09-15 | Color compensation filter |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4231269 | 1992-09-18 | ||
DEP4231269.8 | 1992-09-18 | ||
DE19924231437 DE4231437A1 (de) | 1992-09-19 | 1992-09-19 | Farbstichkompensationsfilter für optische Geräte mit Beobachtungs- und Fotostrahlengang |
DEP4231437.2 | 1992-09-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994007159A1 true WO1994007159A1 (de) | 1994-03-31 |
Family
ID=25918637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1993/000867 WO1994007159A1 (de) | 1992-09-18 | 1993-09-15 | Farbstichkompensationsfilter für optische geräte mit beobachtungs- und fotostrahlengang |
Country Status (6)
Country | Link |
---|---|
US (1) | US5625492A (de) |
EP (1) | EP0613563B1 (de) |
JP (1) | JP3355188B2 (de) |
AT (1) | ATE157174T1 (de) |
DE (1) | DE59307174D1 (de) |
WO (1) | WO1994007159A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3630808B2 (ja) * | 1995-12-28 | 2005-03-23 | 株式会社ソキア | 非偏光ビームスプリッタ |
KR20010109910A (ko) * | 2000-06-03 | 2001-12-12 | 김진덕 | 필터에 의한 광학계의 색수차(굴절율) 보정 방법 |
US6611378B1 (en) | 2001-12-20 | 2003-08-26 | Semrock, Inc. | Thin-film interference filter with quarter-wavelength unit sub-layers arranged in a generalized pattern |
KR100973647B1 (ko) * | 2007-11-20 | 2010-08-02 | 삼성코닝정밀소재 주식회사 | 디스플레이 장치용 필터 |
US20100290230A1 (en) * | 2009-05-15 | 2010-11-18 | Dirk Carl W | Protective Light Filters and Illuminants Having Customized Spectral Profiles |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2358667A1 (fr) * | 1976-07-17 | 1978-02-10 | Reichert Optische Werke Ag | Filtre d'interference dielectrique |
EP0300579A2 (de) * | 1987-07-22 | 1989-01-25 | Philips Patentverwaltung GmbH | Optisches Interferenzfilter |
EP0438646A1 (de) * | 1989-12-19 | 1991-07-31 | Deutsche Spezialglas Ag | Rückblickspiegel für Fahrzeuge, insbesondere Kraftfahrzeuge |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE215371C (de) * | ||||
GB1270042A (en) * | 1970-05-29 | 1972-04-12 | Standard Telephones Cables Ltd | Optical filters |
US4145113A (en) * | 1977-08-05 | 1979-03-20 | C. Reichert Optische Werke, Ag | Color correcting interference filter |
JPS6088902A (ja) * | 1983-10-21 | 1985-05-18 | Dainippon Printing Co Ltd | 色分離フイルタ |
US4896928A (en) * | 1988-08-29 | 1990-01-30 | Coherent, Inc. | Chromatically invariant multilayer dielectric thin film coating |
US5099359A (en) * | 1990-09-11 | 1992-03-24 | Eastman Kodak Company | Composite optical interference filter for use in film scanner system |
-
1993
- 1993-09-15 US US08/244,054 patent/US5625492A/en not_active Expired - Fee Related
- 1993-09-15 AT AT93919003T patent/ATE157174T1/de active
- 1993-09-15 WO PCT/DE1993/000867 patent/WO1994007159A1/de active IP Right Grant
- 1993-09-15 JP JP50768494A patent/JP3355188B2/ja not_active Expired - Fee Related
- 1993-09-15 EP EP93919003A patent/EP0613563B1/de not_active Expired - Lifetime
- 1993-09-15 DE DE59307174T patent/DE59307174D1/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2358667A1 (fr) * | 1976-07-17 | 1978-02-10 | Reichert Optische Werke Ag | Filtre d'interference dielectrique |
EP0300579A2 (de) * | 1987-07-22 | 1989-01-25 | Philips Patentverwaltung GmbH | Optisches Interferenzfilter |
EP0438646A1 (de) * | 1989-12-19 | 1991-07-31 | Deutsche Spezialglas Ag | Rückblickspiegel für Fahrzeuge, insbesondere Kraftfahrzeuge |
Also Published As
Publication number | Publication date |
---|---|
DE59307174D1 (de) | 1997-09-25 |
US5625492A (en) | 1997-04-29 |
EP0613563A1 (de) | 1994-09-07 |
EP0613563B1 (de) | 1997-08-20 |
JP3355188B2 (ja) | 2002-12-09 |
JPH07501409A (ja) | 1995-02-09 |
ATE157174T1 (de) | 1997-09-15 |
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