Penta Prism

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Description

Penta Prism is used to define right angles in optical systems,it  provides right handed images,feature a ray deviation of 90°.Penta Prism is a five-sided prism containing two reflecting surfaces at 45° to each other, and two refracting faces perpendicular to the entering and emerging beams. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum.

The wavelength of  SYCCO  general windows substrate(without coating)

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Specifications

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

Note:
1. Please contact us for the prices.
2. Custom-made non-standard Penta Prisms at any size are available upon request.
3. Besides N-Bk7, non-stand Penta Prisms made of other optical materials are availbale upon request.
4. Custom-made Penta Prisms with better flatness (<l/4@633nm), or better surface Quality(Better
than 40/20,or 20/10) are available up on request.
5. AR coating on the input/output surfaces are available.

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

Packaging & Delivery

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