CA979250A - Internal illumination of optical devices - Google Patents

Internal illumination of optical devices

Info

Publication number
CA979250A
CA979250A CA156,551A CA156551A CA979250A CA 979250 A CA979250 A CA 979250A CA 156551 A CA156551 A CA 156551A CA 979250 A CA979250 A CA 979250A
Authority
CA
Canada
Prior art keywords
optical devices
internal illumination
illumination
internal
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
Application number
CA156,551A
Other versions
CA156551S (en
Inventor
Thomas M. Faraday
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.)
Minister of National Defence of Canada
Original Assignee
Minister of National Defence of Canada
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 Minister of National Defence of Canada filed Critical Minister of National Defence of Canada
Priority to CA156,551A priority Critical patent/CA979250A/en
Application granted granted Critical
Publication of CA979250A publication Critical patent/CA979250A/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
    • G02B27/32—Fiducial marks and measuring scales within the optical system
    • G02B27/34—Fiducial marks and measuring scales within the optical system illuminated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/28—Structurally-combined illuminating devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
CA156,551A 1972-11-15 1972-11-15 Internal illumination of optical devices Expired CA979250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA156,551A CA979250A (en) 1972-11-15 1972-11-15 Internal illumination of optical devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA156,551A CA979250A (en) 1972-11-15 1972-11-15 Internal illumination of optical devices

Publications (1)

Publication Number Publication Date
CA979250A true CA979250A (en) 1975-12-09

Family

ID=4094994

Family Applications (1)

Application Number Title Priority Date Filing Date
CA156,551A Expired CA979250A (en) 1972-11-15 1972-11-15 Internal illumination of optical devices

Country Status (1)

Country Link
CA (1) CA979250A (en)

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