Beam Blocking and Combining Optic
First Claim
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1. A beam blocking and combining optic comprising:
- a wedged optically transparent substrate with a hard dielectric coating applied to a beam combining side of the substrate, the hard dielectric coating having a high reflectance at a laser wavelength and controlled transmittance at visible wavelengths,wherein the substrate is designed with a wedge angle chosen to minimise astigmatism when viewing through the substrate and the hard dielectric coating is designed to maintain good colour balance in a viewing path between a viewer and a target while protecting the viewer from reflected laser radiation.
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Abstract
A beam blocking and combining optic comprising a wedged optically transparent substrate with a hard dielectric coating applied to a beam combining side of the substrate. The coating has a high reflectance at a laser wavelength and high transmittance at visible wavelengths. The single optical component can combine laser beams into a viewing path and act as a laser safety filter to protect the viewer from reflected laser radiation while providing good colour balance and very low astigmatism in the viewing path and very low astigmatism in the reflected laser beam.
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18 Claims
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1. A beam blocking and combining optic comprising:
a wedged optically transparent substrate with a hard dielectric coating applied to a beam combining side of the substrate, the hard dielectric coating having a high reflectance at a laser wavelength and controlled transmittance at visible wavelengths, wherein the substrate is designed with a wedge angle chosen to minimise astigmatism when viewing through the substrate and the hard dielectric coating is designed to maintain good colour balance in a viewing path between a viewer and a target while protecting the viewer from reflected laser radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
Specification