Chromium Cube Half Mirrors

CSCH

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CSCH

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”.

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Name Design wavelength Length Delivery Price Add to cart

Chromium Cube Half Mirror 15mm 400 - 700nm
CSCH-15-550

400 - 700nm

15mm

6-12 weeks

£100.60

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	15mm

Chromium Cube Half Mirror 30mm 400 - 700nm
CSCH-30-550

400 - 700nm

30mm

3-5 days

£207.20

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	30mm

Chromium Cube Half Mirror 20mm 750 - 850nm
CSCH-20-800

750 - 850nm

20mm

3-5 days

£144.90

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	750 - 850nm
A＝B＝C	20mm

Chromium Cube Half Mirror 20mm 400 - 700nm
CSCH-20-550

400 - 700nm

20mm

3-5 days

£131.70

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

Chromium Cube Half Mirror 10mm 750 - 850nm
CSCH-10-800

750 - 850nm

10mm

3-5 days

£94.60

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	750 - 850nm
A＝B＝C	10mm

Chromium Cube Half Mirror 40mm 400 - 700nm
CSCH-40-550

400 - 700nm

40mm

6-12 weeks

£495.20

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	40mm

Chromium Cube Half Mirror 10mm 400 - 700nm
CSCH-10-550

400 - 700nm

10mm

6-12 weeks

£88.60

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	10mm

Chromium Cube Half Mirror 25mm 400 - 700nm
CSCH-25-550

400 - 700nm

25mm

3-5 days

£144.90

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	25mm

Chromium Cube Half Mirror 15mm 750 - 850nm
CSCH-15-800

750 - 850nm

15mm

6-12 weeks

£113.80

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	750 - 850nm
A＝B＝C	15mm

Chromium Cube Half Mirror 50mm 400 - 700nm
CSCH-50-550

400 - 700nm

50mm

6-12 weeks

£616.90

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	50mm

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◦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.