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TIR Prism and RTIR Prism

Total Internal Reflection Prism(TIR prism) is a combination of two laminated prisms, a TIR prism effectively directing the incident light to DMD chip, the expected image is projected following the light beam reflected by DMD chip.TIR /RTIR prism are applied in DLP projection system, light path is changed by using TIR to save the space in optical engine and enhance contrast level of the system.

In an RTIR architecture, a reverse total internal reflection (RTIR) prism is used in a projection path between a spatial light modulator and the projection optics.

SICUBE offers ODM and OEM of high end optical components,like TIR prism and RTIR prism.


SICUBE's high precision prisms mainly include TIR prisms,RTIR prisms, PBS prisms, combination prisms, biometric prisms, AR prisms and so on. They are widely used in DLP projection,DMD projector, 3D cinema, fingerprint identification, 3D printing and scanning, AR display and other fields. 


1. full process machining and testing capability

2. customized production, timely delivery

3. processing capacity: angle accuracy: 5 "; surface accuracy: within1/10 λ; dimension accuracy: + 0.02mm.

4. green production, environmental protection

SICUBE can produce various sizes of TIR prism,RTIR prism for DLP projection optical system, suitable for 0.2, 0.3, 0.45, 0.47, 0.65, 0.95 inch DMD chips. In addition to providing conventional visible TIR/RTIR prisms, SICUBE can provides both 365 nm-405 nm and 750 nm working band TIR prisms for 3D printing and sweeping requirements.