KR900003655B1 - Auxiliary light projecting apparatus for a focus detecting system - Google Patents

Auxiliary light projecting apparatus for a focus detecting system

Info

Publication number
KR900003655B1
KR900003655B1 KR8702720A KR870002720A KR900003655B1 KR 900003655 B1 KR900003655 B1 KR 900003655B1 KR 8702720 A KR8702720 A KR 8702720A KR 870002720 A KR870002720 A KR 870002720A KR 900003655 B1 KR900003655 B1 KR 900003655B1
Authority
KR
South Korea
Prior art keywords
light projecting
detecting system
auxiliary light
projecting apparatus
patterned
Prior art date
Application number
KR8702720A
Other languages
Korean (ko)
Other versions
KR870009254A (en
Inventor
Yasuyuki Tejima
Saburo Sugawara
Hideaki Yuda
Original Assignee
Asahi Chemical Ind
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 Asahi Chemical Ind filed Critical Asahi Chemical Ind
Publication of KR870009254A publication Critical patent/KR870009254A/en
Application granted granted Critical
Publication of KR900003655B1 publication Critical patent/KR900003655B1/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/30—Focusing aids indicating depth of field
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/02—Focusing arrangements of general interest for cameras, projectors or printers moving lens along baseboard

Abstract

A lens (4) projects an image from a patterned surface (5) onto the measurement object during the operating process of an arrangement for determining the focursed state of a lens w.r.t. a second optical axis of the projection lens so that the projected patterned image extends at least partially along the first optical axis. The patterned surface is inclined w.r.t. a plane perpendicular to the projection lens. The projected patterned image is conjugate to the patterned image on the patterned surface.
KR8702720A 1986-03-25 1987-03-25 Auxiliary light projecting apparatus for a focus detecting system KR900003655B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP66976 1986-03-25
JP6696786 1986-03-25
JP62026124A JPH0697299B2 (en) 1986-03-25 1987-02-06 Auxiliary projector for focus detection

Publications (2)

Publication Number Publication Date
KR870009254A KR870009254A (en) 1987-10-24
KR900003655B1 true KR900003655B1 (en) 1990-05-28

Family

ID=13331300

Family Applications (1)

Application Number Title Priority Date Filing Date
KR8702720A KR900003655B1 (en) 1986-03-25 1987-03-25 Auxiliary light projecting apparatus for a focus detecting system

Country Status (3)

Country Link
JP (1) JPH0697299B2 (en)
KR (1) KR900003655B1 (en)
CA (1) CA1281576C (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5596406A (en) * 1979-01-19 1980-07-22 Hitachi Ltd Device for determining roughness of surface
JPH0677100B2 (en) * 1985-01-19 1994-09-28 ミノルタカメラ株式会社 Illumination optical system for focus detection

Also Published As

Publication number Publication date
JPS6323114A (en) 1988-01-30
CA1281576C (en) 1991-03-19
KR870009254A (en) 1987-10-24
JPH0697299B2 (en) 1994-11-30

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Legal Events

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E902 Notification of reason for refusal
G160 Decision to publish patent application
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Payment date: 20050524

Year of fee payment: 16

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