GB2004383B - Optical image-forming apparatus - Google Patents

Optical image-forming apparatus

Info

Publication number
GB2004383B
GB2004383B GB7834468A GB7834468A GB2004383B GB 2004383 B GB2004383 B GB 2004383B GB 7834468 A GB7834468 A GB 7834468A GB 7834468 A GB7834468 A GB 7834468A GB 2004383 B GB2004383 B GB 2004383B
Authority
GB
United Kingdom
Prior art keywords
forming apparatus
optical image
optical
image
forming
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
GB7834468A
Other versions
GB2004383A (en
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.)
Farrand Optical Co Inc
Original Assignee
Farrand Optical Co Inc
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
Priority claimed from US05/828,783 external-priority patent/US4163542A/en
Application filed by Farrand Optical Co Inc filed Critical Farrand Optical Co Inc
Publication of GB2004383A publication Critical patent/GB2004383A/en
Application granted granted Critical
Publication of GB2004383B publication Critical patent/GB2004383B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
    • G02B2027/0121—Parasitic image effect attenuation by suitable positioning of the parasitic images
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
GB7834468A 1977-08-29 1978-08-24 Optical image-forming apparatus Expired GB2004383B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/828,783 US4163542A (en) 1976-05-10 1977-08-29 Optical image-forming apparatus with tilted bi-refringent elements

Publications (2)

Publication Number Publication Date
GB2004383A GB2004383A (en) 1979-03-28
GB2004383B true GB2004383B (en) 1982-07-28

Family

ID=25252736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7834468A Expired GB2004383B (en) 1977-08-29 1978-08-24 Optical image-forming apparatus

Country Status (4)

Country Link
CA (1) CA1102600A (en)
DE (1) DE2836184A1 (en)
FR (1) FR2402219A1 (en)
GB (1) GB2004383B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178554A (en) * 1985-07-27 1987-02-11 Stc Plc Optical expanded beam termination
SE455662B (en) * 1986-11-28 1988-07-25 Hasselblad Ab Victor IMAGE SENDER
US5625372A (en) * 1994-12-21 1997-04-29 Siliscape, Inc. Compact compound magnified virtual image electronic display
US5644323A (en) * 1994-12-21 1997-07-01 Siliscape, Inc. Miniature synthesized virtual image electronic display
US5684497A (en) * 1994-12-21 1997-11-04 Siliscape, Inc. Twice folded compound magnified virtual image electronic display
US6433935B2 (en) 1996-07-02 2002-08-13 Three-Five Systems, Inc. Display illumination system
US5771124A (en) * 1996-07-02 1998-06-23 Siliscape Compact display system with two stage magnification and immersed beam splitter
US6340230B1 (en) * 2000-03-10 2002-01-22 Optical Coating Laboratory, Inc. Method of using a retarder plate to improve contrast in a reflective imaging system
DE102009057033A1 (en) * 2009-12-04 2011-06-09 Bayerische Motoren Werke Aktiengesellschaft Projection unit for a head-up display and method for operating a projection unit for a head-up display

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1321303A (en) * 1970-03-31 1973-06-27 Pilkington Perkin Elmer Ltd Optical systems
DE2340687A1 (en) * 1973-08-10 1975-02-20 Sick Optik Elektronik Erwin OPTICAL ARRANGEMENT
US3940203A (en) * 1975-04-01 1976-02-24 Farrand Optical Co., Inc. Image-forming apparatus
US4093347A (en) * 1976-05-10 1978-06-06 Farrand Optical Co., Inc. Optical simulation apparatus using controllable real-life element

Also Published As

Publication number Publication date
FR2402219B1 (en) 1984-01-20
DE2836184C2 (en) 1987-12-10
DE2836184A1 (en) 1979-03-08
GB2004383A (en) 1979-03-28
FR2402219A1 (en) 1979-03-30
CA1102600A (en) 1981-06-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee