GB475415A - Improvements in or relating to optical systems - Google Patents

Improvements in or relating to optical systems

Info

Publication number
GB475415A
GB475415A GB1384436A GB1384436A GB475415A GB 475415 A GB475415 A GB 475415A GB 1384436 A GB1384436 A GB 1384436A GB 1384436 A GB1384436 A GB 1384436A GB 475415 A GB475415 A GB 475415A
Authority
GB
United Kingdom
Prior art keywords
filter
blue
green
minus
reflected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1384436A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ADRIAN BERNARD KLEIN
Original Assignee
ADRIAN BERNARD KLEIN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ADRIAN BERNARD KLEIN filed Critical ADRIAN BERNARD KLEIN
Priority to GB1384436A priority Critical patent/GB475415A/en
Publication of GB475415A publication Critical patent/GB475415A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10Beam splitting or combining systems
    • G02B27/1006Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/1013Beam splitting or combining systems for splitting or combining different wavelengths for colour or multispectral image sensors, e.g. splitting an image into monochromatic image components on respective sensors
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10Beam splitting or combining systems
    • G02B27/14Beam splitting or combining systems operating by reflection only
    • G02B27/144Beam splitting or combining systems operating by reflection only using partially transparent surfaces without spectral selectivity
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10Beam splitting or combining systems
    • G02B27/14Beam splitting or combining systems operating by reflection only
    • G02B27/149Beam splitting or combining systems operating by reflection only using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes

Abstract

475,415. Colour photography. KLEIN, A.B. May 15, 1936, No. 13844. [Class 97 (i)] Relates to beam splitting blocks of the kind including two partially reflecting surfaces oppositely angularly disposed to an incident beam of light so that part of the beam passes through undeviated and parts are reflected laterally in opposite directions. A colour filter is provided within the block behind each of the semi-reflecting surfaces so that any stray light reflected from a portion of the prism lying beyond the reflecting plane responsible for the formation of a lateral image, will, when finally emerging from the face of the prism .adjacent to the plane in which the said image is to be recorded, be minus light which the recording filter is capable of transmitting or, if a photographic emulsion is used which does not require such a filter, which the emulsion is capable of recording. As shown, the block is built up from right-angle isosceles prisms 1, 2, 3, 4. The surfaces 17 and 20 are coated with a partially reflecting surface of, for example, aluminium. Magenta (minus green) filters 21, 22 are interposed and the prismscemented in pairs with hard Canada Balsam and dried off. The hypotenuse faces 18, 19 and 10, 13 are polished and the surface 17, 18 aluminized and cemented to the surface 10, 13 with soft Canada Balsam with the interposition of a yellow (minus blue) filter, and dried off. The filters are dyed films of, for example, cellulose acetate. This may be applied in the form of a liquid containing the dye. Of the light entering the prism, only red rays are passed through undeviated. Blue and red will be reflected through blue filter 30 to form the blue component image. Alternatively, a blue-sensitive emulsion may be used without a filter. Green and red rays are reflected through the green filter 31 to give the green component image. Alternatively, a yellow (minus blue) filter may be used with a green-sensitive emulsion. The red filter 34 is optional. A single objective 25 or separate objectives 26, 27, 28 may be used. By choosing different filters for inclusion in the block, the planes in which the three colour component images are recorded may be interchanged.
GB1384436A 1936-05-15 1936-05-15 Improvements in or relating to optical systems Expired GB475415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1384436A GB475415A (en) 1936-05-15 1936-05-15 Improvements in or relating to optical systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1384436A GB475415A (en) 1936-05-15 1936-05-15 Improvements in or relating to optical systems

Publications (1)

Publication Number Publication Date
GB475415A true GB475415A (en) 1937-11-15

Family

ID=10030357

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1384436A Expired GB475415A (en) 1936-05-15 1936-05-15 Improvements in or relating to optical systems

Country Status (1)

Country Link
GB (1) GB475415A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638030A (en) * 1948-12-27 1953-05-12 Fish Schurman Corp Beam splitting means
US2737076A (en) * 1952-06-12 1956-03-06 Technicolor Motion Picture Method of making optical prism
US2754718A (en) * 1953-07-14 1956-07-17 Technicolor Motion Picture Prism assembly and method of manufacture
US4850685A (en) * 1984-10-22 1989-07-25 Seiko Epson Corporation Projection-type color display device
US4904061A (en) * 1984-10-22 1990-02-27 Seiko Epson Corporation Projection-type liquid crystal display device with even color
US4909601A (en) * 1987-04-14 1990-03-20 Seiko Epson Corporation Projection-type color display device with light valves positioned at unequal distances from the light source
US5191450A (en) * 1987-04-14 1993-03-02 Seiko Epson Corporation Projection-type color display device having a driving circuit for producing a mirror-like image
EP1006391A1 (en) * 1998-12-04 2000-06-07 Canon Kabushiki Kaisha Cross dichroic prism
DE102011117570A1 (en) 2011-06-28 2013-01-03 blnsight3D GmbH Beam splitter cross for use in color beam splitter and beam splitter combination for bifurcating color distribution, has color splitting layer, which is applied with cut-off length that divides incident light beam

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638030A (en) * 1948-12-27 1953-05-12 Fish Schurman Corp Beam splitting means
US2737076A (en) * 1952-06-12 1956-03-06 Technicolor Motion Picture Method of making optical prism
US2754718A (en) * 1953-07-14 1956-07-17 Technicolor Motion Picture Prism assembly and method of manufacture
US4850685A (en) * 1984-10-22 1989-07-25 Seiko Epson Corporation Projection-type color display device
US4904061A (en) * 1984-10-22 1990-02-27 Seiko Epson Corporation Projection-type liquid crystal display device with even color
US4909601A (en) * 1987-04-14 1990-03-20 Seiko Epson Corporation Projection-type color display device with light valves positioned at unequal distances from the light source
US5191450A (en) * 1987-04-14 1993-03-02 Seiko Epson Corporation Projection-type color display device having a driving circuit for producing a mirror-like image
EP1006391A1 (en) * 1998-12-04 2000-06-07 Canon Kabushiki Kaisha Cross dichroic prism
US6327092B1 (en) 1998-12-04 2001-12-04 Canon Kabushiki Kaisha Cross dichroic prism
DE102011117570A1 (en) 2011-06-28 2013-01-03 blnsight3D GmbH Beam splitter cross for use in color beam splitter and beam splitter combination for bifurcating color distribution, has color splitting layer, which is applied with cut-off length that divides incident light beam

Similar Documents

Publication Publication Date Title
US4464018A (en) Liquid crystal light valve image projection system with color selective prepolarization and blue mirror
US4295153A (en) Stereoscopic apparatus and method of using same
Williams et al. Multiple internal reflections in photographic color prints
US4690526A (en) Prism assembly for a single light valve full-color projector
TWI301558B (en) Optical prism assembly
US3767290A (en) Beam splitting prism system for color television
US3497283A (en) Color selection polarizing beam splitter
US3202039A (en) Optical system for a color television camera
US2403685A (en) Light filter
NL8902205A (en) Projection system.
GB506827A (en) Improvements in or relating to photographic emulsions
US4072405A (en) Prism system for use in tricolor separation
JP3417757B2 (en) Liquid crystal display device and light beam separating method thereof
GB1474699A (en) Beam splitting prism assembly
GB538013A (en) Improvements in and relating to electro-optical reproduction of colour photographs
US3694090A (en) Instrument for observing colored bubble image
US20140036364A1 (en) Regular pentagon-arranged optical beam splitting and combining assembly
DE19833132B4 (en) Apparatus and method for combining light beams by means of two flat plates with an air gap in between
GB1529711A (en) Optical etc phase filters producing near-field patterns
GB1377627A (en) Beam splitting prisms
US10852481B2 (en) Color separation in planar waveguides using wavelength filters
JPH04263597A (en) Color three-dimensional display device
GB1470756A (en) Prism
US2815695A (en) Neutral beam splitter
GB1350249A (en) Colour photographic silver halide materials