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Products / Optics /Prisms /Penta Prism /
Penta Prism
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A Penta prism is a five-side prism, featuring two important properties. Firstly, the image is neither inverted nor reversed while it is deviated by 90 degree. Secondly, it is a constant deflection device, i.e., all the transmitted rays are exactly deflected by 90 degree. Slight movement of the prisms does not affect the right deflected angle. This feature makes the prism useful in rangefinder. It is also used in viewfinders of single reflex cameras. The reflecting surfaces are enhanced aluminium-coated with black paint overcoat for protection.




General Specifications

Shape

Penta Prism

Material

BK7

Coating

Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm

Dimensional Tolerance(mm)

±0.2

Deviation Angle(degree)

90

Flatness

Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Surface Quality

40/20

Clear Aperture

>90%

Chamfer

0.5mmx45°

Damage Threshold(pulsed)

7.5 J/cm2 (10ns/10Hz)






Notes:

Dimension A*h (mm)

Angle Tolerance


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Compare Model Drawings & Specs Coating Angle Tolerance Dimension A*h (mm) Availability Price
BK7-PP-30*30-550
BK7, Penta Prism, A*h=30*30mm, Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm 		±3 arcmin30*30 In Stock $68.00
BK7-PP-40*40-550
BK7, Penta Prism, A*h=40*40mm, Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm 		±3 arcmin40*40 In Stock $88.00
BK7-PP-7*6-550
BK7, Penta Prism, A*h=7*6mm, Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm 		<30 arcsec7*6 In Stock $37.00
BK7-PP-10*10-550
BK7, Penta Prism, A*h=10*10mm, Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm 		<30 arcsec10*10 In Stock $48.00
BK7-PP-20*20-550
BK7, Penta Prism, A*h=20*20mm, Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm 		<30 arcsec20*20 In Stock $56.00
BK7-PP-25.4*25.4-550
BK7, Penta Prism, A*h=25.4*25.4mm, Protected Aluminum reflective coating, Single Layer MgF2 AR coating at 550nm 		<30 arcsec25.4*25.4 In Stock $85.00

BK7-PP-25.4*25.4-550 - Parameter

Type
Penta Prism

Material
BK7

Surface Quality
40/20

Clear Aperture
>90%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Dimensional Tolerance (mm)
± 0.2

Flatness
Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Angle Tolerance
<30 arcsec

Deviation Angle (degree)
90

Dimension A*h (mm)
25.4*25.4

BK7-PP-20*20-550 - Parameter

Type
Penta Prism

Material
BK7

Surface Quality
40/20

Clear Aperture
>90%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Dimensional Tolerance (mm)
± 0.2

Flatness
Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Angle Tolerance
<30 arcsec

Deviation Angle (degree)
90

Dimension A*h (mm)
20*20

BK7-PP-10*10-550 - Parameter

Type
Penta Prism

Material
BK7

Surface Quality
40/20

Clear Aperture
>90%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Dimensional Tolerance (mm)
± 0.2

Flatness
Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Angle Tolerance
<30 arcsec

Deviation Angle (degree)
90

Dimension A*h (mm)
10*10

BK7-PP-7*6-550 - Parameter

Type
Penta Prism

Material
BK7

Surface Quality
40/20

Clear Aperture
>90%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Dimensional Tolerance (mm)
± 0.2

Flatness
Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Angle Tolerance
<30 arcsec

Deviation Angle (degree)
90

Dimension A*h (mm)
7*6

BK7-PP-40*40-550 - Parameter

Type
Penta Prism

Material
BK7

Surface Quality
40/20

Clear Aperture
>90%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Dimensional Tolerance (mm)
± 0.2

Flatness
Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Angle Tolerance
±3 arcmin

Deviation Angle (degree)
90

Dimension A*h (mm)
40*40

BK7-PP-30*30-550 - Parameter

Type
Penta Prism

Material
BK7

Surface Quality
40/20

Clear Aperture
>90%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Dimensional Tolerance (mm)
± 0.2

Flatness
Reflection Surface: λ/4@633nm; Transmission Surface: λ/2@633nm

Angle Tolerance
±3 arcmin

Deviation Angle (degree)
90

Dimension A*h (mm)
30*30

BK7-PP-25.4*25.4-550 - Download

BK7-PP-20*20-550 - Download

BK7-PP-10*10-550 - Download

BK7-PP-7*6-550 - Download

BK7-PP-40*40-550 - Download

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BK7-PP-30*30-550 - Download

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