Standard N-BK7 Right-Angle Prisms

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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Showing 29 of 29 total products

Compatibility:

Description	Compatibility	Size	Hypotenuse	Coating Type	Avail.	Price
BRAP10-ARight-Angle Prism, N-BK7, 3.2 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	3.20 mm	4.50 mm	Protected Aluminum Hypotenuse	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$136
BRAP10-AVRight-Angle Prism, N-BK7, 3.2 mm, λ/8, Al Hypotenuse, AR.14	UNIVERSAL	3.20 mm	4.50 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$149
BRAP11Right-Angle Prism, N-BK7, 5 mm, λ/8, Uncoated	UNIVERSAL	5.0 mm	7.00 mm	Uncoated	2 Weeks	$103
BRAP11-ARight-Angle Prism, N-BK7, 5 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	5.0 mm	7.00 mm	Protected Aluminum Hypotenuse	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$112
BRAP11-AVRight-Angle Prism, N-BK7, 5 mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	5.0 mm	7.00 mm	AR Coated Legs - Aluminized Hypotenuse	7 Weeks	$125
BRAP12Right-Angle Prism, N-BK7, 7 mm, λ/8, Uncoated	UNIVERSAL	7.0 mm	9.90 mm	Uncoated	7 Weeks	$103
BRAP12-ARight-Angle Prism, N-BK7, 7 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	7.0 mm	9.90 mm	Protected Aluminum Hypotenuse	4 Weeks	$114
BRAP12-AVRight-Angle Prism, N-BK7, 7 mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	7.0 mm	9.90 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$125
BRAP13Right-Angle Prism, N-BK7, 10 mm, λ/8, Uncoated	UNIVERSAL	10.0 mm	14.10 mm	Uncoated	3 Weeks	$103
BRAP13-ARight-Angle Prism, N-BK7, 10 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	10.0 mm	14.10 mm	Protected Aluminum Hypotenuse	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$113
BRAP13-AVRight-Angle Prism, N-BK7, 10mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	10.0 mm	14.10 mm	AR Coated Legs - Aluminized Hypotenuse	2 Weeks	$125
BRAP14Right-Angle Prism, N-BK7, 12.5 mm, λ/8, Uncoated	UNIVERSAL	12.5 mm	17.50 mm	Uncoated	3 Weeks	$103
BRAP14-ARight-Angle Prism, N-BK7, 12.5mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	12.5 mm	17.50 mm	Protected Aluminum Hypotenuse	Contact Us	$113
BRAP14-AVRight-Angle Prism, N-BK7, 12.5mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	12.5 mm	17.50 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock	$125
BRAP15Right-Angle Prism, N-BK7, 15 mm, λ/8, Uncoated	UNIVERSAL	15.0 mm	21.20 mm	Uncoated	In Stock	$103
BRAP15-ARight-Angle Prism, N-BK7, 15 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	15.0 mm	21.20 mm	Protected Aluminum Hypotenuse	In Stock	$114
BRAP15-AVRight-Angle Prism, N-BK7, 15mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	15.0 mm	21.20 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$125
BRAP16Right-Angle Prism, N-BK7, 20 mm, λ/8, Uncoated	UNIVERSAL	20.0 mm	28.30 mm	Uncoated	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$119
BRAP16-ARight-Angle Prism, N-BK7, 20 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	20.0 mm	28.30 mm	Protected Aluminum Hypotenuse	In Stock	$129
BRAP16-AVRight-Angle Prism, N-BK7, 20mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	20.0 mm	28.30 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock	$142
BRAP17Right-Angle Prism, N-BK7, 25 mm, λ/8, Uncoated	UNIVERSAL	25.0 mm	35.40 mm	Uncoated	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$132
BRAP17-ARight-Angle Prism, N-BK7, 25 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	25.0 mm	35.40 mm	Protected Aluminum Hypotenuse	6 Weeks FREE 2-day shipping on thousands of products on Newport.com Learn More	$140
BRAP17-AVRight-Angle Prism, N-BK7, 25mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	25.0 mm	35.40 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock	$151
BRAP18Right-Angle Prism, N-BK7, 30 mm, λ/8, Uncoated	UNIVERSAL	30.0 mm	42.40 mm	Uncoated	2 Weeks	$155
BRAP18-ARight-Angle Prism, N-BK7, 30 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	30.0 mm	42.40 mm	Protected Aluminum Hypotenuse	In Stock	$165
BRAP18-AVRight-Angle Prism, N-BK7, 30mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	30.0 mm	42.40 mm	AR Coated Legs - Aluminized Hypotenuse	4 Weeks	$176
BRAP19Right-Angle Prism, N-BK7, 50 mm, λ/8, Uncoated	UNIVERSAL	50.0 mm	70.70 mm	Uncoated	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$272
BRAP19-ARight-Angle Prism, N-BK7, 50 mm, λ/8, Aluminum Hypotenuse	UNIVERSAL	50.0 mm	70.70 mm	Protected Aluminum Hypotenuse	Contact Us	$281
BRAP19-AVRight-Angle Prism, N-BK7, 50mm, λ/8, Aluminum Hypotenuse, AR.14	UNIVERSAL	50.0 mm	70.70 mm	AR Coated Legs - Aluminized Hypotenuse	In Stock	$293

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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.

Standard N-BK7 Right-Angle Prisms

Standard N-BK7 Right-Angle Prisms

Specifications

Features

Total Internal Reflection

Optional Aluminized Hypotenuse

N-BK7 for VIS and NIR Applications

Optional AR-coated Legs

RoHS Compliant

Resources

Technical Notes

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Optic Cleaning Supplies

Economy N-BK7 Right-Angle Prisms