Lens-free ophtalmoscope

Details Lens-free ophtalmoscope Lens-free ophtalmoscope

2002-12-18

2009-02-03

Dang, Hung X (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

Reexamination Certificate

active

07484848

ABSTRACT:
A lens-free ophthalmoscope (21, 41) comprising means (22, 42) defining a first light path (a), reflective means (23, 43) arranged to divert light from the first light path (a) along a second light path (b) extending through a first window (24, 44) and into a subject eye (29, 49), a second window (25, 45) through which a user can view a subject generally parallel to the second light path (b), and a baffle (23, 26; 43, 46) arranged between the first light path (a) and second window (25, 45) to prevent, or at least substantially reduce, any light exiting the ophthalmoscope through the second window (25, 45). Hence, any light which might otherwise pass through the second window (25) int the eye (30, 50) of an user, is eliminated or at least substantially reduced, thereby substantially reducing glace and enhancing the user's view of the subject eye (29, 49).

REFERENCES:
patent: 5880713 (1999-03-01), Belardinelli
patent: 6783239 (2004-08-01), Epitropoulos
patent: 2004/0012759 (2004-01-01), Lo
patent: 2204144 (1988-02-01), None

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