Chromium Half-Mirror Plate Beamsplitters

PSCH

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PSCH

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.

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Name Design wavelength Diameter φD Delivery Price Add to cart

Chromium Plate Half Mirror 30mm Diameter 400 - 700nm
PSCH-30C03-10-550

400 - 700nm

30mm

1 week

£130.30

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ30mm
Thickness t	3mm
Parallelism	＜5″

Chromium Plate Half Mirror 50mm Diameter 400 - 700nm
PSCH-50C05-10-550

400 - 700nm

50mm

6-12 weeks

£199.80

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ50mm
Thickness t	5mm
Wedge angle W	＜5″

Chromium Plate Half Mirror 100mm Diameter 400 - 700nm
PSCH-100C10-10-550

400 - 700nm

100mm

1 week

£660.30

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ100mm
Thickness t	10mm
Parallelism	＜5″

Chromium Plate Half Mirror 30mm Diameter 750 - 850nm
PSCH-30C03-10-800

750 - 850nm

30mm

1 week

£164.10

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	750 - 850nm
Diameter φD	φ30mm
Thickness t	3mm
Parallelism	＜5″

Chromium Plate Half Mirror 50mm Diameter Wedged 750 - 850nm
PSCH-50C08-10W-800

750 - 850nm

50mm

6-12 weeks

£275.40

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	750 - 850nm
Diameter φD	φ50mm
Thickness t	8mm
Wedge angle W	1°±5′

Chromium Plate Half Mirror 30mm Diameter Wedged 400 - 700nm
PSCH-30C05-10W-550

400 - 700nm

30mm

6-12 weeks

£130.30

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ30mm
Thickness t	5mm
Wedge angle W	1°±5′

Chromium Plate Half Mirror 50mm Diameter Wedged 400 - 700nm
PSCH-50C08-10W-550

400 - 700nm

50mm

1 week

£199.80

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ50mm
Thickness t	8mm
Wedge angle W	1°±5′

Chromium Plate Half Mirror 100mm Diameter Wedged 400 - 700nm
PSCH-100C15-10W-550

400 - 700nm

100mm

in stock

£660.30

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ100mm
Thickness t	15mm
Wedge angle W	1°±5′

Chromium Plate Half Mirror 30mm Diameter Wedged 750 - 850nm
PSCH-30C05-10W-800

750 - 850nm

30mm

1 week

£194.00

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	750 - 850nm
Diameter φD	φ30mm
Thickness t	5mm
Wedge angle W	1°±5′

Chromium Plate Half Mirror 25.4mm Diameter 400 - 700nm
PSCH-25.4C03-10-550

400 - 700nm

25.4mm

6-12 weeks

£118.90

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ25.4mm
Thickness t	3mm
Parallelism	＜5″

Chromium Plate Half Mirror 40mm Diameter 400 - 700nm
PSCH-40C04-10-550

400 - 700nm

40mm

1 week

£165.10

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ40mm
Thickness t	4mm
Parallelism	＜5″

Chromium Plate Half Mirror 60mm Diameter 400 - 700nm
PSCH-60C06-10-550

400 - 700nm

60mm

6-12 weeks

£252.00

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	400 - 700nm
Diameter φD	φ60mm
Thickness t	6mm
Wedge angle W	＜5″

Chromium Plate Half Mirror 25.4mm Diameter 750 - 850nm
PSCH-25.4C03-10-800

750 - 850nm

25.4mm

6-12 weeks

£144.90

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	750 - 850nm
Diameter φD	φ25.4mm
Thickness t	3mm
Parallelism	＜5″

Chromium Plate Half Mirror 50mm Diameter 750 - 850nm
PSCH-50C05-10-800

750 - 850nm

50mm

6-12 weeks

£245.50

Material	BK7
Surface flatness	λ/10
Coating	Front surface ; Chromium Rear surfaces ; Multilayer antireflection coating
Incident angle	45°
Transmittance <br> (Average P and S)	30±5% (average with respect to wavelength.)
Divergence ratio <br> (reflectance : transmittance)	1 : 1
Laser Damage Threshold	0.25J/cm² (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Surface Quality <br> (Scratch-Dig)	40-20
Wavelength range	750 - 850nm
Diameter φD	φ50mm
Thickness t	5mm
Parallelism	＜5″

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◦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.