Viewfinder with diffractive optical element

Details Viewfinder with diffractive optical element Viewfinder with diffractive optical element

1998-09-16

2000-08-15

Spyrou, Cassandra

Optical: systems and elements

Diffraction

From grating

359 19, 359565, 359570, 359571, 359574, 359575, 359744, 396147, 396148, 396287, 396296, 396383, G02B 2744

Patent

active

061045330

ABSTRACT:
An optical viewfinder system comprising two optical elements, and a field stop or a reticle, to provide an image of a scene to a viewer, and further comprising a diffractive optical element to provide a clear, stationary image of the field stop or reticle to the viewer.

REFERENCES:
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patent: 4436398 (1984-03-01), Endo et al.
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patent: 5715090 (1998-02-01), Meyers
patent: 5715091 (1998-02-01), Meyers
patent: 5966244 (1999-10-01), Mukai
Hecht-Zajac, "Optics", Addison-Wesley, p.84, 1979.
Iizuka, "Engineering Optics", Springer-Verlag, p.99, 1985.

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