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GB2238137B - Optical system - Google Patents

Optical system

Info

Publication number
GB2238137B
GB2238137B GB8925599A GB8925599A GB2238137B GB 2238137 B GB2238137 B GB 2238137B GB 8925599 A GB8925599 A GB 8925599A GB 8925599 A GB8925599 A GB 8925599A GB 2238137 B GB2238137 B GB 2238137B
Authority
GB
United Kingdom
Prior art keywords
optical system
optical
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 - Fee Related
Application number
GB8925599A
Other versions
GB2238137A (en
GB8925599D0 (en
Inventor
Harold Thomas Brown
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.)
Marconi Instruments Ltd
Original Assignee
Marconi Instruments 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 Marconi Instruments Ltd filed Critical Marconi Instruments Ltd
Priority to GB8925599A priority Critical patent/GB2238137B/en
Publication of GB8925599D0 publication Critical patent/GB8925599D0/en
Publication of GB2238137A publication Critical patent/GB2238137A/en
Application granted granted Critical
Publication of GB2238137B publication Critical patent/GB2238137B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0257—Diffusing elements; Afocal elements characterised by the diffusing properties creating an anisotropic diffusion characteristic, i.e. distributing output differently in two perpendicular axes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
GB8925599A 1989-11-13 1989-11-13 Optical system Expired - Fee Related GB2238137B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8925599A GB2238137B (en) 1989-11-13 1989-11-13 Optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8925599A GB2238137B (en) 1989-11-13 1989-11-13 Optical system

Publications (3)

Publication Number Publication Date
GB8925599D0 GB8925599D0 (en) 1990-01-04
GB2238137A GB2238137A (en) 1991-05-22
GB2238137B true GB2238137B (en) 1993-11-03

Family

ID=10666210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8925599A Expired - Fee Related GB2238137B (en) 1989-11-13 1989-11-13 Optical system

Country Status (1)

Country Link
GB (1) GB2238137B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5768017A (en) * 1994-10-31 1998-06-16 International Business Machines Corporation Optical system for producing uniform line illumination

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB487541A (en) * 1936-05-20 1938-06-22 Philips Nv Improvements in or relating to searchlight or picture-projection installations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB487541A (en) * 1936-05-20 1938-06-22 Philips Nv Improvements in or relating to searchlight or picture-projection installations

Also Published As

Publication number Publication date
GB2238137A (en) 1991-05-22
GB8925599D0 (en) 1990-01-04

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Legal Events

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

Effective date: 19941113