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HR Right Angle Retroreflectors

Two glued optical elements in blue and gray colors standing upright

HR Right Angle Retroreflectors

Wavelength range

190-3000 nm

Dimensions L x H

10×10 – 100×100 mm

Surface quality, S-D

20-10; 40-20*

Surface flatness, P-V

<λ/10 @ 632.8 nm*

Right angle tolerance

±30 arcsec




>20 J/cm² @ 1064 nm, 10 ns, 10 Hz

*depending on material and size

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HR right-angle retroreflectors

The main application for HR right-angle retroreflectors (RR) is for ultrashort pulse back-reflection. Prisms or corner cube retroreflectors introduce considerable group delay dispersion, while HR right-angle retroreflectors have controlled GDD coatings. Such retroreflectors are popular among laser source manufacturers.

Dielectric and metallic coatings can be applied on flat mirrors glued into HR right-angle retroreflectors. A custom design provides the opportunity to create such products as low-loss retroreflectors, broadband low-GDD retroreflectors, wide-acceptance-angle retroreflectors, and even retroreflectors that work as wavelength separators.

Over more than 20 years, Altechna has gathered experience in manufacturing custom retroreflectors. All the main coating technologies, including e-beam + IAD, IBS and magnetron sputtering, can be applied in the RR manufacturing process.

The assembly process of HR right-angle retroreflectors allows controlling the right angle during the gluing procedure. The standard right-angle accuracy is <30 arcsec, and <10 arcsec can be achieved upon request.

Another application for retroreflectors was demonstrated in 1962, during the Lunar Laser Ranging experiment. Researchers succeeded in observing laser pulses reflected from a retroreflector array left on the surface of the Moon by those involved in the Apollo 11 mission.

Feel free to reach out to us with a custom-designed retroreflector for your laser system or any inquiries you may have at: [email protected]. We’re here to assist you!


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