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PSCH
Wavelength range
Diameter φD
Thickness t
Parallelism
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Chromium plate half mirrors are plate beamsplitters that are coated with chromium (Cr) on the front surface of optical parallels or wedged substrates. The other surface is coated with multi-layer anti-reflection.

◦Half mirror divides input beam into reflectance and transmittance ratio of 1:1. A beamsplitter of R:T=1:1 is called “Half Mirror”.
◦Approximately one third of the input beam is lost because of the absorption of chromium. However these beamsplitters do not depend on wavelength, polarization and angle of incidence of the input beam, and provide a highly neutral reflectivity.
◦Plate beamsplitters have beam deviations on transmission and ghost on rear surface reflections. Wedged substrates are used to prevent ghosting.

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Guide

▶Please contact our Sales Division for customized products. (Customized on size, wavelength or R:T, etc.)
W3802
▶For a guarantee in reflected wavefront error or transmitted wavefront error, please contact our Sales Division with your requests.
▶Please refer to here for Wavelength Characteristic Data (Reference Data, EXCEL file format).

Attention

▶The beam deviation at transmission of a wedged beamsplitter is large compared to a one made of optical parallel.
▶The amount of beam deviation of a beamsplitter depends on the thickness of the substrate, the wavelength or the angle of incidence of the input beam.
▶Transmission curves are based on actual measurements and may vary with manufacturing lots.
▶Surface flatness is the reflected wavefront distortion of the surface prior to coating.
▶Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.

Common Specifications
MaterialBK7
Surface flatnessλ/10
CoatingFront surface ; Chromium
Rear surfaces ; Multilayer antireflection coating
Incident angle45°
Transmittance
(Average P and S)
30±5% (average with respect to wavelength.)
Divergence ratio
(reflectance : transmittance)
1 : 1
Laser Damage Threshold0.25J/cm2 (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality
(Scratch-Dig)
40-20
Clear aperture90% of the diameter
Outline Drawing

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Schematic

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Optical Parallel

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Wedged Substrate

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Typical Transmittance Data
■PSCH-550

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T: Transmission
■PSCH-800

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T: Transmission
Spec
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Part Number
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    JP Yen Stock Qty
PSCH-25.4C03-10-550
PSCH-30C03-10-550
PSCH-30C05-10W-550
PSCH-40C04-10-550
PSCH-50C05-10-550
PSCH-50C08-10W-550
PSCH-60C06-10-550
PSCH-100C10-10-550
PSCH-100C15-10W-550
PSCH-25.4C03-10-800
PSCH-30C03-10-800
PSCH-30C05-10W-800
PSCH-50C05-10-800
PSCH-50C08-10W-800

400 - 700nm

φ25.4mm

3mm

<5″

400 - 700nm

φ30mm

3mm

<5″

400 - 700nm

φ30mm

5mm

1°±5′

400 - 700nm

φ40mm

4mm

<5″

400 - 700nm

φ50mm

5mm

<5″

400 - 700nm

φ50mm

8mm

1°±5′

400 - 700nm

φ60mm

6mm

<5″

400 - 700nm

φ100mm

10mm

<5″

400 - 700nm

φ100mm

15mm

1°±5′

750 - 850nm

φ25.4mm

3mm

<5″

750 - 850nm

φ30mm

3mm

<5″

750 - 850nm

φ30mm

5mm

1°±5′

750 - 850nm

φ50mm

5mm

<5″

750 - 850nm

φ50mm

8mm

1°±5′

RoHS  

¥13,000

IN STOCK
RoHS  

¥14,250

IN STOCK
RoHS  

¥14,250

IN STOCK
RoHS  

¥18,050

LOW
RoHS  

¥21,850

IN STOCK
RoHS  

¥21,850

LOW
RoHS  

¥27,550

LOW
RoHS  

¥72,200

CONTACT
US
RoHS  

¥72,200

CONTACT
US
RoHS  

¥18,000

LOW
RoHS  

¥21,850

IN STOCK
RoHS  

¥21,850

IN STOCK
RoHS  

¥33,250

IN STOCK
RoHS  

¥33,250

CONTACT
US