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JPS5499652A - Retinal camera - Google Patents

Retinal camera

Info

Publication number
JPS5499652A
JPS5499652A JP656278A JP656278A JPS5499652A JP S5499652 A JPS5499652 A JP S5499652A JP 656278 A JP656278 A JP 656278A JP 656278 A JP656278 A JP 656278A JP S5499652 A JPS5499652 A JP S5499652A
Authority
JP
Japan
Prior art keywords
focus
luminous
luminous flux
eyeground
examined
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.)
Granted
Application number
JP656278A
Other languages
Japanese (ja)
Other versions
JPS6121655B2 (en
Inventor
Yoshi Kobayakawa
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 JP656278A priority Critical patent/JPS5499652A/en
Publication of JPS5499652A publication Critical patent/JPS5499652A/en
Publication of JPS6121655B2 publication Critical patent/JPS6121655B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Eye Examination Apparatus (AREA)

Abstract

PURPOSE: To adjust the focus of retinal camera easily, by reflecting the index image forming luminous flux for focus adjustment by a reflecting member other than the reflecting member for eyeground illuminating luminous flux, and directing the reflected flux into the eye to be examined through the objective system.
CONSTITUTION: The luminous flux passing through a slit in a linear slit shielding plate 20 form a light source 17 is separated from the middle by a split prism 21, and is refracted into upper and lower sides to enter the eye to be examined, thereby becoming two luminous fluxes A, A. In order to coincide these two luminous fluxes A, A, the slit shielding plate 20 and split prism 21 are moved in the direction of optical axis to be adjusted properly. With these movements, the movement of an imaging lens 8 cooperates, so that the position of coincidence of the two luminous fluxes and the surface of film 10 are maintained in conjugation, so that the focus of the photographing system consisting of objective lens 6 and imaging lens 8 is adjusted on the eyeground. Hence, the operator can adjust the focus easily while observing the index image for focus adjustment on a Braun tube 16.
COPYRIGHT: (C)1979,JPO&Japio
JP656278A 1978-01-24 1978-01-24 Retinal camera Granted JPS5499652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP656278A JPS5499652A (en) 1978-01-24 1978-01-24 Retinal camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP656278A JPS5499652A (en) 1978-01-24 1978-01-24 Retinal camera

Publications (2)

Publication Number Publication Date
JPS5499652A true JPS5499652A (en) 1979-08-06
JPS6121655B2 JPS6121655B2 (en) 1986-05-28

Family

ID=11641760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP656278A Granted JPS5499652A (en) 1978-01-24 1978-01-24 Retinal camera

Country Status (1)

Country Link
JP (1) JPS5499652A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171033A (en) * 1984-02-15 1985-09-04 株式会社トプコン Eyeground camera with focus detection system
US5382988A (en) * 1992-07-31 1995-01-17 Nidek Co., Ltd. Stereoscopic retinal camera with focus detection system
CN107315022A (en) * 2017-07-21 2017-11-03 中国地质大学（武汉） A kind of X-ray collimation location adjusting device and system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51330A (en) * 1974-06-19 1976-01-06 Canon Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51330A (en) * 1974-06-19 1976-01-06 Canon Kk

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171033A (en) * 1984-02-15 1985-09-04 株式会社トプコン Eyeground camera with focus detection system
JPH041623B2 (en) * 1984-02-15 1992-01-13 Topcon Corp
US5382988A (en) * 1992-07-31 1995-01-17 Nidek Co., Ltd. Stereoscopic retinal camera with focus detection system
CN107315022A (en) * 2017-07-21 2017-11-03 中国地质大学（武汉） A kind of X-ray collimation location adjusting device and system

Also Published As

Publication number Publication date
JPS6121655B2 (en) 1986-05-28

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