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Corner cubes

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Corner cube prisms comprise of three reflective prism faces, which return an incident light beam in the opposite direction and are used to collapse optical cavities, reduce weight, and improve system performance.

High-precision retro-reflectors offer excellent parallelism between input and output beams, eliminate mounting errors, and provide reduced sensitivity to thermal errors.

G&H has earned ISO9001 and AS9100C certifications. Durability testing can be performed against MIL, DIN, or BSI standards as appropriate.

We design and manufacture our corner cubes, by hand, in the United Kingdom.


Corner cube prisms for imaging applications are used where it is difficult or too time-consuming to attain precision alignment of the returned beam. The monolithic structure of the component eliminates mounting errors such as can arise when using mirrors and is also less sensitive to thermal errors.

Corner cube prisms for imaging applications are optimized for broadband performance and minimal transmitted wavefront distortion. Corner cubes may be supplied with or without coatings on the reflecting surfaces as they operate on the principles of total internal reflection (TIR). Coatings are recommended in applications where TIR angles are exceeded or the surfaces cannot be kept clean.

High-precision retro-reflectors offer excellent parallelism between input and output beams. They can be used in surveying applications or other imaging applications. Backside protective black coatings protect the working surface of the corner cube while mounting or handling.

Laser cavities and laser range finding

High laser damage threshold corner cubes prisms from G&H are used in laser rangefinders to collapse the optical cavity, reduce weight, and improve system performance.

Our corner cubes for laser applications are optimized for laser damage threshold and minimization of losses due to absorption, reflection, transmission, and scattering, and are used in laser cavity designs as a circulator or in instrumentation for compact beam-folded designs.

Corner cubes are most often used in laser cavity designs as a circulator. These are often deployed in laser range finding applications to keep system size and weight to a minimum. Our corner cubes for laser range finding are compact, precise, and designed to withstand environmentally challenging operating conditions.

Wavelength ranges240–5000 nm
Dimensions5–150 mm diameter
Coating optionsFront surface anti-reflection coatings
Back surface metal coatings
Back surface protective black coatings for improved handling performance
High laser damage threshold coatings
Country of manufactureUK

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Instrumentation applications

Corner cube reflectors can also be used in spectrometer designs, as the returned beam is highly parallel to the input beam due to the inherent monolithic structure of the corner cube.


From high transmission broadband anti-reflection coatings to V-coats for high energy applications, our extensive coating capabilities for precision optical components deliver performance across the spectrum from the UV to the FIR. Take a closer look at our optical coatings service.


We have made a significant investment in metrology equipment to ensure that our customers receive quality, high-performing precision optical components. More details on our metrology capabilities can be found on our metrology page.

Environmental testing

Environmental testing of components and coatings is critical for the assurance of performance in rugged conditions. G&H environmental testing capabilities include MIL-C-675C, MIL-C-48497A, MIL-E-12397, and MIL-M-13508C for endurance against abrasion, adhesion, humidity, temperature, and environmental conditions.

Product enquiry

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