GB1275090A - Improvements in or relating to head-up displays - Google Patents

Improvements in or relating to head-up displays

Info

Publication number
GB1275090A
GB1275090A GB5394969A GB5394969A GB1275090A GB 1275090 A GB1275090 A GB 1275090A GB 5394969 A GB5394969 A GB 5394969A GB 5394969 A GB5394969 A GB 5394969A GB 1275090 A GB1275090 A GB 1275090A
Authority
GB
United Kingdom
Prior art keywords
graticules
images
auxiliary
main
degrees
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
GB5394969A
Inventor
Fritz Peter Heller
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London Ltd
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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Priority to GB5394969A priority Critical patent/GB1275090A/en
Priority to DE19702054260 priority patent/DE2054260A1/en
Priority to FR7039662A priority patent/FR2066979B1/fr
Publication of GB1275090A publication Critical patent/GB1275090A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)

Abstract

1275090 Head up displays ELLIOTT BROS (LONDON) Ltd 3 Nov 1970 [4 Nov 1969] 53949/69 Heading G2J A head up display device comprises a semi reflector 15, a lens arrangement 14, a light source 13 and two main graticules 20, 21, the graticule 20 being plane polarizing in one direction except for a transparent portion defining an image and the graticules 21 being flame polarizing, in a direction perpendicular to the polarizing direction of the graticule 20, except for a transparent portion defining an image so that light passes through both graticules only in those regions defining the two images. The graticules 20, 21 may be moved transversely by means 22, 23. Auxiliary graticules 25, 26 may be provided between between the main graticules 20, 21, the auxiliary graticules 25, 26 being transparent except in the region of the images where they are plane polarized at angles of 45 degrees to the angles of polarization of the main graticules so that the auxiliary graticules project images rotated at 45 degrees to the main images. The polarized images of the auxiliary graticules may be replaced by "halfwave" images, thus rotating the auxiliary 90 degrees with respect to the main images.
GB5394969A 1969-11-04 1969-11-04 Improvements in or relating to head-up displays Expired GB1275090A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5394969A GB1275090A (en) 1969-11-04 1969-11-04 Improvements in or relating to head-up displays
DE19702054260 DE2054260A1 (en) 1969-11-04 1970-11-04 Presentation system
FR7039662A FR2066979B1 (en) 1969-11-04 1970-11-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5394969A GB1275090A (en) 1969-11-04 1969-11-04 Improvements in or relating to head-up displays

Publications (1)

Publication Number Publication Date
GB1275090A true GB1275090A (en) 1972-05-24

Family

ID=10469497

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5394969A Expired GB1275090A (en) 1969-11-04 1969-11-04 Improvements in or relating to head-up displays

Country Status (3)

Country Link
DE (1) DE2054260A1 (en)
FR (1) FR2066979B1 (en)
GB (1) GB1275090A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153913A (en) * 1976-06-18 1979-05-08 Pilkington P.E. Limited Head-up displays
US4178074A (en) * 1977-03-28 1979-12-11 Elliott Brothers (London) Limited Head-up displays

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153913A (en) * 1976-06-18 1979-05-08 Pilkington P.E. Limited Head-up displays
US4178074A (en) * 1977-03-28 1979-12-11 Elliott Brothers (London) Limited Head-up displays

Also Published As

Publication number Publication date
FR2066979B1 (en) 1974-04-26
DE2054260A1 (en) 1971-05-27
FR2066979A1 (en) 1971-08-13

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees