Chinese Optics, Volume. 17, Issue 3, 648(2024)
Optical design and spectral optimization of Philips prism 3CMOS camera
Fig. 8. Calculation model of simplified broad beam thin film spectral
Fig. 9. (a) 24 color checker samples, (b) sample reflectance, (c) light source spectrum, and (d) color matching functions used in optimization
Fig. 10. Optimized (a) ideal film transmittance and (b) camera spectra
Fig. 11. (a) Designed basic thin film spectrum and (b) optimized thin film spectrum
Fig. 12. Camera spectra obtained from simplified model (a) before and (b) after optimization; camera spectra obtained from Monte Carlo ray tracing (c) before and (d) after optimization
Table 1. Parameters of optical system
View tableView in ArticleTable 1. Parameters of optical system
Parameter Value Field of view: 2ω 45° Focal length 35.5 mm F# <3 Distortion <1% Incident angle <6 degree MTF@110 lp/mm >0.3
Table 2. Philips prism parameters
View tableView in ArticleTable 2. Philips prism parameters
Parameter Value α 25.1 mm β 12.9 mm L1 10.6 mm L2 8.1 mm L 44 mm θB 50.2° θR 50.9° DB 22.17 mm DR 22.15 mm D1 1.62 mm D2−DG 0.53 mm
Table 3. Color errors of four sets of camera spectra
View tableView in ArticleTable 3. Color errors of four sets of camera spectra
ΔE0 ΔE1 ΔE2 $\Delta {E'_{01}} $ $\Delta {E'_{02}} $ $\Delta {E'_{12}} $ ε Basic film，Simplified Avg 0.248 0.460 0.777 0.457 0.673 1.105 1.017 Max 1.245 1.526 4.190 1.537 3.051 4.553 Basic film，Monte Carlo Avg 0.238 0.501 0.678 0.372 0.709 1.038 0.967 Max 0.865 1.471 4.557 1.149 3.937 4.992 Optimized film，Simplified Avg 0.387 0.431 0.431 0.222 0.212 0.360 0.601 Max 1.577 1.667 1.579 0.851 0.804 1.299 Optimized film，Monte Carlo Avg 0.417 0.466 0.311 0.239 0.278 0.329 0.595 Max 1.522 1.629 1.401 0.987 1.111 1.152
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Su-hao CHEN, Bo LV, Wei-qi LIU. Optical design and spectral optimization of Philips prism 3CMOS camera[J]. Chinese Optics, 2024, 17(3): 648
Category: Original Article
Received: Aug. 31, 2023
Accepted: Oct. 30, 2023
Published Online: Jul. 31, 2024
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