UV-BLOCKING COATING WITH CAPPING LAYER FOR OPTICS
First Claim
1. An optical assembly comprising:
- an optical element;
a blocking coating in contact with the optical element, the blocking coating including a light absorber that does not transmit light with wavelengths from greater than or equal to about 190 nm to less than or equal to about 500 nm; and
a capping layer, the light absorber being positioned between the capping layer and the optical element.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical assembly and a method for making the optical assembly. The optical assembly includes an optical element; a blocking coating; a capping layer on the blocking coating; a holder; and an adhesive configured to adhere the optical element to the holder. The blocking coating includes a light absorber that does not transmit light with wavelengths from greater than or equal to about 250 nm to less than or equal to about 400 nm; The light absorber is positioned such that light having a wavelength from greater than or equal to about 190 nm to less than or equal to about 500 nm is not incident to the adhesive. The capping layer is made from a material having high transmission in the UV and enables use of aggressive cleaning treatments on the optical element significant impairment of the UV transmission of the optical element.
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Citations
20 Claims
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1. An optical assembly comprising:
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an optical element; a blocking coating in contact with the optical element, the blocking coating including a light absorber that does not transmit light with wavelengths from greater than or equal to about 190 nm to less than or equal to about 500 nm; and a capping layer, the light absorber being positioned between the capping layer and the optical element. - View Dependent Claims (2, 3, 4, 5)
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6. An optical assembly comprising:
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an optical element; a holder for the optical element; a blocking coating positioned between the optical element and the holder, the blocking coating including a light absorber that does not transmit light with wavelengths from greater than or equal to about 190 nm to less than or equal to about 500 nm; a capping layer positioned between the light absorber and the holder; and an adhesive configured to adhere the optical element to the holder; wherein the light absorber is positioned such that light having a wavelength from greater than or equal to about 190 nm to less than or equal to about 500 nm is not incident to the adhesive. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for reducing degradation of an adhesive in a optical assembly, the method comprising:
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applying a blocking coating to an optical element, the blocking coating including a light absorber that does not transmit light with wavelengths from greater than or equal to about 190 nm to less than or equal to about 500 nm; applying a capping layer to the blocking coating, the capping layer comprising SiO2 or a metal oxide material; applying an adhesive to the capping layer; and configuring the light absorber and the adhesive so that light with wavelengths from greater than or equal to about 190 nm to less than or equal to about 500 nm is not incident to the adhesive.
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Specification