DOE-based systems and devices for producing laser beams having modified beam characteristics
First Claim
1. A laser beam producing system comprises:
- a visible laser diode (VLD), for producing a laser beam from its junction;
a collimating lens (L1) for collimating the laser beam as it is transmitted through collimating lens L1 and through the system in an S-incident manner;
a fixed spatial-frequency diffractive optical element (DOE) denotable by D1;
a fixed spatial-frequency diffractive optical element (DOE) denotable by D2; and
a focusing lens (L2) disposed between DOE D1 and DOE D2 and adjustably translatable along its optical axis for focusing the output laser beam to some point in space.
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Abstract
Novel methods are disclosed for designing and constructing miniature optical systems and devices employing light diffractive optical elements (DOEs) for modifying the size and shape of laser beams produced from a commercial-grade laser diodes, over an extended range hitherto unachievable using conventional techniques. The systems and devices of the present invention have uses in a wide range of applications, including laser scanning, optical-based information storage, medical and analytical instrumentation, and the like. In the illustrative embodiments, various techniques are disclosed for implementing the DOEs as holographic optical elements (HOEs), computer-generated holograms (CGHs), as well as other diffractive optical elements.
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Citations
12 Claims
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1. A laser beam producing system comprises:
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a visible laser diode (VLD), for producing a laser beam from its junction;
a collimating lens (L1) for collimating the laser beam as it is transmitted through collimating lens L1 and through the system in an S-incident manner;
a fixed spatial-frequency diffractive optical element (DOE) denotable by D1;
a fixed spatial-frequency diffractive optical element (DOE) denotable by D2; and
a focusing lens (L2) disposed between DOE D1 and DOE D2 and adjustably translatable along its optical axis for focusing the output laser beam to some point in space. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A laser beam producing system comprises:
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a visible laser diode (VLD), for producing a laser beam from its junction;
a collimating lens (L1) for collimating the laser beam as it is transmitted through collimating lens L1 and through the system in a P-incident manner;
a fixed spatial-frequency diffractive optical element (DOE) denotable by D1;
a fixed spatial-frequency diffractive optical element (DOE) denotable by D2; and
a focusing lens (L2) disposed between DOE D1 and DOE D2 and adjustably translatable along its optical axis during the alignment stage of the system assembly process for focusing the output laser beam to some point in space. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification