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Wavelength Beamsplitter [Dichroic Mirror]
Separates light by wavelength, reflecting selected bands and transmitting others, such as reflecting red and transmitting blue. A beamsplitter is an important optical interferometer component, widely used in laser equipment and fiber communication. It divides one beam into a source-described liang beams, or multiple beams. The split beams have the same properties as the source, or partly the same properties when polarization splitting is used, and their total intensity equals the source intensity if splitting losses are ignored. Structure: multilayer dielectric coatings on a plane glass substrate provide wavelength selectivity through interference. Coating thickness and materials determine reflection and transmission cutoff wavelengths. Principle: interference reflects selected wavelengths and transmits others. Splitting properties depend on optical coating thickness, equal to refractive index multiplied by physical thickness.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dimensional Tolerance | +0/-0.2mm |
| Thickness Tolerance | ±0.2mm |
| Surface Finish | 60/40 |
| Clear Aperture Dimension | >90% |
| Surface Figure [632.8nm] | <λ/8@632.8nm |
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Datasheet
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