Light emitting unit and image taking apparatus

Details Light emitting unit and image taking apparatus Light emitting unit and image taking apparatus

2007-05-01

2007-05-01

Mack, Ricky (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

Reexamination Certificate

active

11211601

ABSTRACT:
The present invention provides a light emitting unit that can accurately control the light output angle and/or direction over long period and an image taking apparatus provided with the light emitting unit. The light emitting unit has a light source, a reflector provided at the back surface of the light source and an optical member provided at the front of the light source. The optical member having: a container which is light-transmissive at least in a light passage region; a light-transmissive dispersion medium enclosed in the container; a dispersoid which is dispersed in the dispersion medium, which is light-transmissive, and which has a refractive index different from the refractive index of the dispersion medium. The optical member controls the output angle and/or direction of the light emitted from the light source and reflected by the reflector by moving the dispersoid using electromagnetic force.

REFERENCES:
patent: 6268092 (2001-07-01), Akashi et al.
patent: 6919003 (2005-07-01), Ikeda et al.
patent: 2002-341311 (2002-11-01), None
Philips' Fluid Lenses, in Digital Photography Review (dpreview.com), Mar. 3, 2004.

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