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Right angle prisms are simply triangular blocks of glass with two 45° and one 90° angles. The precision grade right angle prisms have high surface quality and tight tolerance angles. The normal use for a right-angle prism is to turn light through 90° by internal reflection from the hypotenuse. These right angle prisms are stocked with a variety of coatings to meet a variety of applications. The simplest is a totally uncoated right angle prism; uncoated right-angle prisms will rely on total internal reflection and so is limited in the angular range it will reflect. Prisms coated with a standard reflecting coating, generally aluminium, will work over a wider range of incidence angles. 

These are commonly known as protected right angle prisms. Another option is to apply a conventional mirror coating on the hypotenuse surface, which allows the prism to be used as a mirror but mounted from behind, these types of prism are commonly known as external reflector prisms. We also supply a stock range of extended broad band anti-reflective right angle prisms coated on the input and output faces to improve efficiency. Right angle prisms are generally used to bend light, reflect light and for image displacement.

Stock right angled prisms are available to purchase directly from this site. We also offer custom right angled prisms in unique sizes and designs to meet our customers individual requirements. For more information on our custom capabilities or to place an order, please contact our technical sales team.

Material:
Dimensions:
Angles:
Surface Quality:
Flatness:
Coating:

N-BK7 or equivalent
+0/-0.2mm
±1 arcmin
40/20 scratch dig
<λ/4 over 25mm (over inscribed eclipse)
AR coated range:
Antireflective coated/ extended visible (AV2)
Broadband Multilayer AR, R.avg<0.5%@450-950nm, AOI= 0°-45 °
Protected range:
Protected aluminium/ visible use (MV2) Ali/SiO₂ R.avg.>88%@450-650nm,AOI=0°-45°
Protection is matt black paint however surfaces on custom prisms can be coated with epoxy matt black paint
External reflector range:
Protected aluminium/ visible use (MV2)
Ali/SiO₂ R.avg.>88%@450-650nm,AOI=0°-45°

Uncoated range: All faces are left uncoated.
AR coated range: Antireflective coating on entry/exit faces to achieve 99% efficiency.
Protected range: Aluminised and black painted on Hypotenuse to achieve 90% internal reflection over a greater angular range.
External reflector range: Aluminised and protected on hypotenuse for use as mirrors.
Uncoated prisms can be coated with a range of mirror coatings for UV, NIR and FIR applications.
Prisms can be ground down on width with smaller dimensions.
Prisms can be reshaped to meet your instrument needs.

AR coated range:
Antireflective coated/ extended visible (AV2)
Broadband Multilayer AR, R.avg<0.5%@450-950nm, AOI= 0°-45 °

Protected range:
Protected aluminium/ visible use (MV2) Ali/SiO₂ R.avg.>88%@450-650nm,AOI=0°-45°
Protection is matt black paint however surfaces on custom prisms can be coated with epoxy matt black paint.


External reflector range:
Protected aluminium/ visible use (MV2)
Ali/SiO₂ R.avg.>88%@450-650nm,AOI=0°-45°

Uncoated range

44 Items

Name Coating Grade Entry Face Height A/C (mm) Entry Face Height B/C (mm) Material Price Buy
PTK6503 External reflector Precision 65 65 N-BK7 or equivalent
$183.41
PTK6502 Protected Precision 65 65 N-BK7 or equivalent
$183.41
PTK6501 AR coated (Entry+exit faces) Precision 65 65 N-BK7 or equivalent
$187.58
PTK6500 Uncoated Precision 65 65 N-BK7 or equivalent
$173.68
PTK5003 External reflector Precision 50 50 N-BK7 or equivalent
$148.66
PTK5002 Protected Precision 50 50 N-BK7 or equivalent
$148.66
PTK5001 AR coated (Entry+exit faces) Precision 50 50 N-BK7 or equivalent
$152.83
PTK5000 Uncoated Precision 50 50 N-BK7 or equivalent
$138.93
PTK4003 External reflector Precision 40 40 N-BK7 or equivalent
$115.30
PTK4002 Protected Precision 40 40 N-BK7 or equivalent
$115.30
PTK4001 AR coated (Entry+exit faces) Precision 40 40 N-BK7 or equivalent
$119.47
PTK4000 Uncoated Precision 40 40 N-BK7 or equivalent
$105.57
PTK3003 External reflector Precision 30 30 N-BK7 or equivalent
$78.47
PTK3002 Protected Precision 30 30 N-BK7 or equivalent
$78.47
PTK3001 AR coated (Entry+exit faces) Precision 30 30 N-BK7 or equivalent
$82.64
PTK3000 Uncoated Precision 30 30 N-BK7 or equivalent
$68.74
PTK2503 External reflector Precision 25 25 N-BK7 or equivalent
$61.79
PTK2502 Protected Precision 25 25 N-BK7 or equivalent
$61.79
PTK2501 AR coated (Entry+exit faces) Precision 25 25 N-BK7 or equivalent
$65.96
PTK2500 Uncoated Precision 25 25 N-BK7 or equivalent
$52.06
PTK1503 External reflector Precision 15 15 N-BK7 or equivalent
$56.92
PTK1502 Protected Precision 15 15 N-BK7 or equivalent
$56.92
PTK1501 AR coated (Entry+exit faces) Precision 15 15 N-BK7 or equivalent
$61.09
PTK1500 Uncoated Precision 15 15 N-BK7 or equivalent
$47.19
PTK1303 External reflector Precision 12.5 12.5 N-BK7 or equivalent
$52.06
PTK1302 Protected Precision 12.5 12.5 N-BK7 or equivalent
$52.06
PTK1301 AR coated (Entry+exit faces) Precision 12.5 12.5 N-BK7 or equivalent
$56.23
PTK1300 Uncoated Precision 12.5 12.5 N-BK7 or equivalent
$42.33
PTK1003 External reflector Precision 10 10 N-BK7 or equivalent
$47.89
PTK1002 Protected Precision 10 10 N-BK7 or equivalent
$47.89
PTK1001 AR coated (Entry+exit faces) Precision 10 10 N-BK7 or equivalent
$53.45
PTK1000 Uncoated Precision 10 10 N-BK7 or equivalent
$39.55
PTK0603 External reflector Precision 6.25 6.25 N-BK7 or equivalent
$47.19
PTK0602 Protected Precision 6.25 6.25 N-BK7 or equivalent
$47.19
PTK0601 AR coated (Entry+exit faces) Precision 6.25 6.25 N-BK7 or equivalent
$51.36
PTK0600 Uncoated Precision 6.25 6.25 N-BK7 or equivalent
$37.46
PTK0503 External reflector Precision 5 5 N-BK7 or equivalent
$44.41
PTK0502 Protected Precision 5 5 N-BK7 or equivalent
$44.41
PTK0501 AR coated (Entry+exit faces) Precision 5 5 N-BK7 or equivalent
$48.58
PTK0500 Uncoated Precision 5 5 N-BK7 or equivalent
$34.68
PTK0203 External reflector Precision 2 2 N-BK7 or equivalent
$44.41
PTK0202 Protected Precision 2 2 N-BK7 or equivalent
$44.41
PTK0201 AR coated (Entry+exit faces) Precision 2 2 N-BK7 or equivalent
$48.58
PTK0200 Uncoated Precision 2 2 N-BK7 or equivalent
$34.68

44 Items

1

Precision BK7 Right Angle Prisms

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