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HR Right Angle Retroreflectors

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

Reflectance

>99.8%

LIDT

>20 J/cm² @ 1064 nm, 10 ns, 10 Hz

*depending on material and size

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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 to be controlled well 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.

 

Please challenge us with a custom-designed retroreflector for your laser system.

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