04422736 is referenced by 15 patents and cites 2 patents.

An eye fundus camera including an illuminating system having two apertured masks. One of the masks has a pair of coaxial ring-shaped slits and located with respect to the objective lens in conjugate with the cornea of the patient's eye, whereas the other has a ring-shaped slit in conjugate with the iris of the eye. The arrangement is effective to provide an increased field angle with a substantially uniform illumination without having adverse effects of harmful reflections.

Title
Eye fundus camera having ring slit mask in illuminating system
Application Number
6/245149
Publication Number
4422736
Application Date
March 18, 1981
Publication Date
December 27, 1983
Inventor
Kazuo Nunokawa
Tokyo
JP
Agent
Brumbaugh Graves Donohue & Raymond
Assignee
Tokyo Kogaku Kikai Kabushiki Kaisha
JP
IPC
G03B 7/00
A61B 3/10
A61B 3/14
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