MULTI-BANDPASS FILTER FOR PROJECTION ARRANGEMENTS
First Claim
1. An optical filter for manipulating the spectrum of a light source, whereby the optical filter is comprised of a transparent substrate and a first layer system applied to only one side, preferably an interference layer system, characterized in that the substrate and the first layer system form a combined UV and IR filter (UV-IR filter) such that radiation portions both below a wavelength of 420 nm, particularly in the UV range, and above a wavelength of 690 nm, particularly in the IR range, are not fully transmitted by the first layer system.
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Abstract
An optical filter for manipulating the spectrum of a light source is comprised of a transparent substrate and a first layer system applied to only one side, preferably an interference layer system. The substrate and the first layer system form a combined UV and IR filter (UV-IR filter) such that radiation portions both below a wavelength of 420 nm, particularly in the UV range, and above a wavelength of 690 nm, particularly in the IR range, are not fully transmitted via the first layer system.
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Citations
9 Claims
- 1. An optical filter for manipulating the spectrum of a light source, whereby the optical filter is comprised of a transparent substrate and a first layer system applied to only one side, preferably an interference layer system, characterized in that the substrate and the first layer system form a combined UV and IR filter (UV-IR filter) such that radiation portions both below a wavelength of 420 nm, particularly in the UV range, and above a wavelength of 690 nm, particularly in the IR range, are not fully transmitted by the first layer system.
Specification