Optometric apparatus

Details Optometric apparatus Optometric apparatus

2007-07-10

2007-07-10

Mack, Ricky (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

C351S217000, C351S235000

Reexamination Certificate

active

10831315

ABSTRACT:
An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; and a controller including a transmitting part which transmits a control signal in the form of an optical signal to the lens chamber units to selectively dispose the optical elements in the test window, the transmitting part being adapted to widen an extent of diffusion of luminous flux of the optical signal more greatly in a forward to upward directions than in a lateral direction.

REFERENCES:
patent: 5281984 (1994-01-01), Burton et al.
patent: 5929971 (1999-07-01), Hosoi et al.
patent: A 9-276218 (1997-10-01), None

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