eo_logo
 
Product added to cart
All Products / Optics / Prisms / Retroreflection Prisms / N-BK7 Corner Cube Retroreflectors
See all 32 Products in Family
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

38.1mm Silver Coated, Corner Cube Prism

N-BK7 Corner Cube Retroreflectors with Black Overpaint

N-BK7 Corner Cube Retroreflectors with Black Overpaint

×
Stock #45-189 3-4 days
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
€343,00
Qty 1-5
€343,00
Qty 6+
€275,00
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Product Downloads

Specifications

General

Type:
Retroreflector
Note:
Black Overpaint is 30-60μm Thick

Physical & Mechanical Properties

Diameter (mm):
38.10 +0.0/-0.1
Height (mm):
29.21
Bevel:
Protective bevel as needed
Clear Aperture (%):
95
Height Tolerance (mm):
±0.25

Optical Properties

Beam Deviation (arcsec):
3
Coating:
Silver with protective overcoat (black overpaint)
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7
Surface Quality:
60-40
Image Orientation:
Left-Handed
Coating Specification:
Reflective Surfaces: Rabs > 97% FROM 400 - 2500nm @ 0° AOI
Ravg > 98% FROM 400 - 2500nm @ 0° AOI
Ray Deviation (°):
180
Wavelength Range (nm):
400 - 2200
Damage Threshold, Reference: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification.
Entrance: 0.5 J/cm2 @ 532nm & 1064nm, 10ns
Power (fringes) @ 632.8nm:
0.25
Irregularity (fringes) @ 632.8nm:
0.25

Regulatory Compliance

RoHS:
Compliant
×
Certificate of Conformance:
View
×

Product Details

  • Incident Light is Reflected Back to the Source
  • Down to 3 Arcsecond Beam Deviation
  • Useful for Surveying and Alignment
  • Also Available Mounted

TECHSPEC® N-BK7 Corner Cube Retroreflectors are designed to reflect any ray or beam entering the prism face, regardless of the orientation of the prism, back onto itself. A mirror will do that only at the normal incidence. As a result, corner cube retroreflectors are useful where precision alignment is impossible or time-consuming. TECHSPEC® N-BK7 Corner Cube Retroreflectors are available with the dihedral surfaces either uncoated or coated with silver. The silver coating provides a larger acceptance angle while the uncoated option, which relies on total internal reflection, provides optimum reflectivity. This coating is covered by a protective black overpaint. Please note, this protective coat increases the diameter of the corner cube retroreflector by 30-60 µm. The input face is available uncoated or coated with an antireflection coating optimized for either visible wavelengths or near infrared wavelengths, including 1064nm and 1550nm.

Laser Optics

N-BK7 Corner Cube Retroreflectors provide high-reflectance cube performance with total internal reflection. Ideal for laser alignment, metrology, and interferometry applications requiring consistent optical return paths. Compact, durable, and designed for maximum angular accuracy without the need for precise alignment.

FAQ(s)

   What is the benefit of N-BK7 glass in this cube reflector?

N-BK7 offers excellent transmission in the visible to near-infrared range and high durability, making it suitable for a wide range of environments.

   Do these retroreflectors require alignment?

No—corner cubes automatically return beams parallel to the input, eliminating the need for precise alignment.

   Can these be used in laser-based applications?

Yes, they are commonly used in laser interferometry, alignment systems, and metrology due to their consistent beam return path.

   Are AR coatings available?

Yes, Edmund Optics offers both uncoated and broadband AR-coated options to enhance performance across various wavelengths.

Technical Information

 
A (mm) B (mm) Stock No. Uncoated Stock No. Silver Coated Stock No. Silver and VIS 0° Coated Stock No. Silver and NIR II Coated
7.16 6.1 #65-250 #43-305 #48-605 #12-488
12.7 10.16 #43-296 #45-202 #48-606 #12-489
25.4 19.05 #43-297 #45-187 #48-607 #12-490
38.1 29.21 #43-298 #45-189 #48-608 N/A
50.8 38.1 #43-299 #45-191 #48-609 N/A
63.5 48.26 #43-300 #48-593 #48-616 N/A
76.2 57.15 #43-301 #48-594 #48-617 N/A