Directional Projection Screen using Diverted Corner Cube D-CCR Array

Diverted corner cube retroreflector (D‐CCR) for functional projection screen

“…The optical concept of our functional screen is based on the retroreflection characteristic of a corner cube reflector (CCR) . The dihedral angles are 90° in a conventional CCR.…”

“…To study the deflection and diffusion of a CCR, the z‐plane surface is tilted from the conventional hollow CCR, as shown in Figure A. The retro‐reflected ray is reflected at angle θ view from that of the incident angle which is two times of the divergence angle θ d , as shown in Figure B . To diffuse the reflected light within an angle of Δ θ view , a curved surface is required.…”

“…We exposed a laser light to the screen and took a picture of the reflected light pattern as shown in Figure B. The experiment results were in good agreement with the above simulation results shown in Figure A.…”

“…(Ref. []), we can observe that the unnecessary reflections in the left‐right direction are eliminated and the uniformity of the light in the vicinity of zenith angle 10 deg, i.e., the position of the viewer (center of the viewer's area) is significantly improved. Furthermore, the average gain in the intended area is relatively high, i.e., about 25.…”

“…Variety of screens for front projection have been studied so far, such as matte white diffusive screens, pearl screens, silver screens, and retro screens . A matte screen is a Lambertian type.…”