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JPS559573A - Fundus camera which control exposure - Google Patents
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JPS559573A - Fundus camera which control exposure - Google Patents

Fundus camera which control exposure

Info

Publication number
JPS559573A
JPS559573A JP8278778A JP8278778A JPS559573A JP S559573 A JPS559573 A JP S559573A JP 8278778 A JP8278778 A JP 8278778A JP 8278778 A JP8278778 A JP 8278778A JP S559573 A JPS559573 A JP S559573A
Authority
JP
Japan
Prior art keywords
eye fundus
photographing
eye
lamp
cam
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.)
Pending
Application number
JP8278778A
Other languages
Japanese (ja)
Inventor
Masahiro Ishii
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.)
Canon Inc
Original Assignee
Canon 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
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP8278778A priority Critical patent/JPS559573A/en
Publication of JPS559573A publication Critical patent/JPS559573A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To enable good photographing free from over- and under- exposure to be performed by providing a controlling means for reflecting the change in the angle of view of the photographing system in the shutter opening time.
CONSTITUTION: The luminous flux from a lamp 1 evenly illuminates the eye fundus Ef of the eye E to be examined through a xenon tube 3, slit plate 7 and oblique mirror 10. At this time, the illuminated range of the eye fundus coincides with the wide angle side photographing field of the photograhing system. The scattering reflected luminous flux from the eye fundus EF forms the eye fundus image under the plane by way of opening 10a and spring-up mirror 14 and is observed through eyepiece lens 17. Next, when the lens groups 12a and 12b are controlled to the position on the telescope side, the change in magnification is converted to the cam quantity of a cam face 23. This cam quantity is detected by a follower 24 and the resistance value of a resistor 25 is changed by this. When a release switch R is operated, the lamp 1 goes off, the tube 3 is let to emit light, and the shutter S is opened. After the time corresponding to the resistance valve, S is closed, by which optimum exposure is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP8278778A 1978-07-07 1978-07-07 Fundus camera which control exposure Pending JPS559573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8278778A JPS559573A (en) 1978-07-07 1978-07-07 Fundus camera which control exposure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8278778A JPS559573A (en) 1978-07-07 1978-07-07 Fundus camera which control exposure

Publications (1)

Publication Number Publication Date
JPS559573A true JPS559573A (en) 1980-01-23

Family

ID=13784114

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8278778A Pending JPS559573A (en) 1978-07-07 1978-07-07 Fundus camera which control exposure

Country Status (1)

Country Link
JP (1) JPS559573A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689735U (en) * 1979-12-13 1981-07-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689735U (en) * 1979-12-13 1981-07-17

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