Laser light source device, hologram apparatus, and method...

Details Laser light source device, hologram apparatus, and method... Laser light source device, hologram apparatus, and method...

2011-05-10

2011-05-10

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S569000

Reexamination Certificate

active

07940458

ABSTRACT:
A laser light source device may include a laser diode, first and second optical elements, a diffraction grating, and a detector. The first optical element may collimate laser light emitted from the laser diode. The diffraction grating may reflect zero-order light in the collimated laser light in a predetermined direction other than a direction toward the laser diode and may reflect first-order light in the collimated laser light toward the laser diode. The second optical element may reflect the zero-order light reflected by the diffraction grating in a predetermined direction while transmitting a part of the zero-order light reflected by the diffraction grating. The detector may detect at least one of a wavelength and an intensity of the light that passes through the second optical element.

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