Chromium Cube Half Mirror 20mm 400 - 700nm

CSCH-20-550

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Chromium cube half mirrors consist of two right angle prisms. One of them is coated with chromium (Cr) on the hypotenuse face. Half mirror divides input beam to reflectance and transmittance in 1:1. A beamsplitter of R:T=1:1 is called “Half Mirror”.

Details

◦Four surfaces of the cube are coated with multi-layer anti-reflection coatings.
◦Approximately one third of the input beam is lost because of absorption of chromium coating on the hypotenuse. However these beamsplitters are not wavelength, polarization and incident angle of the input beam dependent and therefore provide a highly neutral reflectivity.
◦For cube beamsplitters, unlike plate beamsplitters, transmission beam deviations and ghosts rarely occur.

More Information

More Information
Name	Chromium Cube Half Mirror 20mm 400 - 700nm
Weight	0.0210kgs
Standard Coatings Available	No
Guide	Please contact our Sales Division for customized products. (Customized on size, wavelength or R:T, etc.) WEB Reference Catalog Code/W3802 For a guarantee in reflected wavefront error or transmitted wavefront error, please contact our Sales Division.
Remark	-
Attention	Input beam from the prism side is indicated by a “○”. Phase retardation of light input will not be preserved. Use a waveplate for phase compensation. Wavelength dispersion of transmitted and reflected light is derived from refractive index and glass thickness and when diverging or introducing a focusing beam, chromatic aberration or spherical aberration may occur. The transmittance curves are based on actual measurements and may vary with manufacturing lots. The surface flatness is the reflected wavefront distortion of the surface before coating. Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
Design wavelength	400 - 700nm
Image Label	Chromium Cube Half Mirror 20mm 400 - 700nm
Length	20mm
Material	BK7
Surface flatness of substrate	λ/4
Beam Deviation	＜5′
Coating	Hypotenuse surface ; Chromium Four surfaces ; Multilayer antireflection coating
Incident angle	0°
Transmittance <br> (Average P and S)	28±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.3J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
A＝B＝C	20mm

In stock

SKU

CSCH-20-550

£131.70

Chromium Cube Half Mirror 20mm 400 - 700nm

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