Fig. 1. Curves of temperature, form variable, and thermal stress with panel thickness. (a) Temperature; (b) form variable; (c) thermal stress

Fig. 2. Total reflection path of optical fiber

Fig. 3. Test of angular properties of attenuating materials. (a) Test method; (b) test result

Fig. 4. Schematic of single channel structure of detector array target

Fig. 5. Simulation of angle characteristics of protective sampling attenuation structure. (a) Ray tracing of simulation model; (b) simulation results of angle characteristics

Fig. 6. Schematic of angle characteristic test based on laser point-by-point scanning method

Fig. 7. Relative intensity coefficients of angular response of each detection channel at different incident angles

Fig. 8. Light spot measurement results. (a) Spot profile; (b) power-time curve