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Standard N-BK7 Right-Angle Prisms

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Overview

N-BK-7 right-angle prisms are polished to λ/8 surface flatness for high precision applications. We offer then with N-BK7 substrates which work great for general laboratory use in the visible and near IR range. Our right-angle prisms are available in a range of sizes from 3.20 mm to 50 mm with a selection of antireflection coatings to meet specific demands.

General purpose N-BK7 prisms
λ/8 surface flatness
40-20 scratch-dig
Optional aluminized hypotenuse and AR-coated legs available
Excellent for beam bending and retroreflection
3.2 mm to 50 mm sizes

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Products

Showing 29 of 29 total products

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Compare	Model	Size	Hypotenuse	Coating Type	Availability	Price	Brand
BRAP10-A Right-Angle Prism, N-BK7, 3.2 mm, λ/8, Aluminum Hypotenuse $132.00 In Stock	BRAP10-A Right-Angle Prism, N-BK7, 3.2 mm, λ/8, Aluminum Hypotenuse	3.20 mm	4.50 mm	Protected Aluminum Hypotenuse	In Stock	$132.00	Newport
BRAP10-AV Right-Angle Prism, N-BK7, 3.2 mm, λ/8, Al Hypotenuse, AR.14 $145.00 In Stock	BRAP10-AV Right-Angle Prism, N-BK7, 3.2 mm, λ/8, Al Hypotenuse, AR.14	3.20 mm	4.50 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock	$145.00	Newport
BRAP11 Right-Angle Prism, N-BK7, 5 mm, λ/8, Uncoated $100.00 In Stock	BRAP11 Right-Angle Prism, N-BK7, 5 mm, λ/8, Uncoated	5.0 mm	7.00 mm	Uncoated	In Stock	$100.00	Newport
BRAP11-A Right-Angle Prism, N-BK7, 5 mm, λ/8, Aluminum Hypotenuse $109.00 In Stock	BRAP11-A Right-Angle Prism, N-BK7, 5 mm, λ/8, Aluminum Hypotenuse	5.0 mm	7.00 mm	Protected Aluminum Hypotenuse	In Stock	$109.00	Newport
BRAP11-AV Right-Angle Prism, N-BK7, 5 mm, λ/8, Aluminum Hypotenuse, AR.14 $121.00 7 Weeks	BRAP11-AV Right-Angle Prism, N-BK7, 5 mm, λ/8, Aluminum Hypotenuse, AR.14	5.0 mm	7.00 mm	AR Coated Legs - Aluminized Hypotenuse	7 Weeks	$121.00	Newport
BRAP12 Right-Angle Prism, N-BK7, 7 mm, λ/8, Uncoated $100.00 7 Weeks	BRAP12 Right-Angle Prism, N-BK7, 7 mm, λ/8, Uncoated	7.0 mm	9.90 mm	Uncoated	7 Weeks	$100.00	Newport
BRAP12-A Right-Angle Prism, N-BK7, 7 mm, λ/8, Aluminum Hypotenuse $111.00 7 Weeks	BRAP12-A Right-Angle Prism, N-BK7, 7 mm, λ/8, Aluminum Hypotenuse	7.0 mm	9.90 mm	Protected Aluminum Hypotenuse	7 Weeks	$111.00	Newport
BRAP12-AV Right-Angle Prism, N-BK7, 7 mm, λ/8, Aluminum Hypotenuse, AR.14 $121.00 In Stock	BRAP12-AV Right-Angle Prism, N-BK7, 7 mm, λ/8, Aluminum Hypotenuse, AR.14	7.0 mm	9.90 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock	$121.00	Newport
BRAP13 Right-Angle Prism, N-BK7, 10 mm, λ/8, Uncoated $100.00 1 Week	BRAP13 Right-Angle Prism, N-BK7, 10 mm, λ/8, Uncoated	10.0 mm	14.10 mm	Uncoated	1 Week	$100.00	Newport
BRAP13-A Right-Angle Prism, N-BK7, 10 mm, λ/8, Aluminum Hypotenuse $110.00 In Stock	BRAP13-A Right-Angle Prism, N-BK7, 10 mm, λ/8, Aluminum Hypotenuse	10.0 mm	14.10 mm	Protected Aluminum Hypotenuse	In Stock	$110.00	Newport

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Specifications

Wavelength Region

Visible and NIR
Material

N-BK7
Surface Quality

40-20 scratch-dig
Surface Flatness

λ/8 at 632.8 nm over the clear aperture
Angle Tolerance

±15 arc seconds
Clear Aperture

Central 80%

Damage Threshold

AR.14 coating: 100 W/cm² CW, 2 J/cm² with 10 nsec pulses @ 532 nm, typical
Size Tolerance

+0.00/-0.10 mm
Chamfers

0.3 mm face width
Chamfers Angle Tolerance

45°
Cleaning

See How to Clean Optics

Features

Total Internal Reflection

By means of total internal reflection (TIR), a right-angle prism may be used as a 90° reflector or as a 180° retroreflector. Except for reflection losses from the entry and exit faces, TIR exhibits 100% reflectivity over a very broad wavelength range. The reflecting surface should be coated with protected aluminum if the incidence angle exceeds that acceptable for TIR or if the environment does not allow the reflecting surface to be kept clean, as TIR requires.

Optional Aluminized Hypotenuse

The reflecting surface should be coated with protected aluminum if the incidence angle exceeds that acceptable for TIR or if the environment does not allow the reflecting surface to be kept clean, as TIR requires. The hypotenuse can also be used as a first surface reflector. In this case, if there is an overcoat of black paint, it should be removed with acetone.

N-BK7 for VIS and NIR Applications

N-BK7 is an excellent lens material for most visible and near infrared applications. It is the most common borosilicate crown optical glass, and it provides great performance at a good value. Its high homogeneity, low bubble and inclusion content, and straightforward manufacturability make it a good choice for transmissive optics.

Optional AR-coated Legs

The -AV versions of these right-angle prisms feature not only an aluminized hypotenuse but also antireflection-coated legs. Newport's AR.14 broadband coating reduces surface losses over a 430-700 nm wavelength range yet does not affect total internal reflection or the acceptance angle.

RoHS Compliant

These prisms have been tested for dangerous substances like Pb, Cd, Hg, Hex-Cr, PBB, and PBDE and have been found to be in compliance with RoHS allowable levels.