Roof Prism

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Product Detail

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Description

A roof prism is a reflective optical prism containing a section where two faces meet at a 90° angle. Reflection from the two 90° faces returns an image that is flipped laterally across the axis where the faces meet.Ideal for use in spotting scopes, and any optical instrument where it is desirable to take an inverted image from an objective, turn it right side up, and bend it through a 90° angle in order to maintain the correct visual orientation.

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Attribute Specification(General) Specification(High Precision)
Material: BK7 Grade A Optical Glass N-BK7 Grade A optical glass
Dimension: 2.5×2.5~100.0×100.0 2.5×2.5~100.0×100.0
Dimension Tolerance: ±0.2 ±0.05 mm
90° Deviation Tolerance: 1 arc min. 3 arc sec.
Flatness: λ/2@633nm λ/4@633nm
Reflection: R90%@400-700nm R>95%per face @400-700nm
Angle Tolerance: 3 arc min. 3 arc sec.
Surface Quality: 60/40 Scratch/Dig 10/5 Scratch/Dig
Coating on input and output sides Uncoated,AR Coated,etc Uncoated,AR Coated,etc

The wavelength of  SYCCO  general windows substrate(without coating)

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Materials characteristic

B270

CaF2

Ge

MgF2

N-BK7

Sapphire

Si

UV Fused Silica

ZnSe

ZnS

Refractive index (nd)

1.523

1.434

4.003

1.413

1.517

1.768

3.422

1.458

2.403

2.631

Coefficient of dispersion (Vd)

58.5

95.1

N/A

106.2

64.2

72.2

N/A

67.7

N/A

N/A

Density(g/cm3)

2.55

3.18

5.33

3.18

2.46

3.97

2.33

2.20

5.27

5.27

TCE(μm/m℃)

8.2

18.85

6.1

13.7

7.1

5.3

2.55

0.55

7.1

7.6

Soften Temperature(℃)

533

800

936

1255

557

2000

1500

1000

250

1525

Knoop hardness

(kg/mm2)

542

158.3

780

415

610

2200

1150

500

120

120

We can supply you professional customized service

a: Dimesion size : 0.2-500mm , thickness >0.1mm
b: Many material could be choiced , include IR material like Ge, Si, Znse, fluoride and so on
c: AR coating or as your request
d: Product shape : round , rectangle or custom shape

Packaging & Delivery

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