Shimadzu optical device for polychromatic light source splitting and as a substitute for monochromator sector mirrors
- Wide wavelength range from UV to IR
- Low dependence on angle of incidence
- Two types available: standard (to 2200 nm) and high-grade (to 3200 nm) types
- RoHS*1) compliant
Polka-Dot Beamsplitters comprise a glass substrate with an aluminum coating in a polka-dot pattern. Incident light is reflected from the coated areas but transmitted through the non-coated areas. This splitting mechanism achieves a light split ratio that is almost independent of the light angle of incidence, unlike dielectric beamsplitters.
Shimadzu Polka-Dot Beamsplitters are based on a synthetic quartz substrate that permits application across a wide wavelength range from the ultraviolet to the infrared.
Product list (table of code numbers)
|Specifications||Nominal light ratio|
|Transmittance*3)||50(+0/-5) %||70(+0/-5) %||30(+0/-5) %|
|Angle of Incidence||0° to 45°|
|Wavelength Range||Standard : 250 to 2200 nm|
|High-grade : 250 to 3200 nm|
|Substrate||UV Grade Fused Silica|
|Dimension Tolerance||±0.1 mm|
|Clear Aperture||Full surface, less outer 1.5 mm|
|Aperture Spacing||0.3 mm|
|Surface Quality||80-50 (MIL-O-13830A)|
|Maximum Temperature||150 °C|
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