Round robin comparison of BRDF measurements

Hallberg, T.; Pearce, Daniel; Raven, Peter N.; Baker, C.J.; Moore, Richard P.; Kariis, Hans

doi:10.1117/12.2534675

Cited by 1 publication

(1 citation statement)

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“…Stray light transmits part of its energy from one component surface to another by scattering and reflection, and there are emitting and receiving surfaces in the transmission process. Therefore, stray light is divided into a number of microsurface elements with the same area, and the total sum of the radiation integral of the micro-surface elements arriving at the image surface is stray light arriving at the image surface [25], [26]. The radiative energy transfer is shown in Figure 8.…”

Section: B Analysis Of the Surface Radiation Energy Transfer Modelmentioning

confidence: 99%

Study on Stray Light Testing and Suppression Techniques for Large-Field of View Multispectral Space Optical Systems

Lu,

Xu,

Zhang

et al. 2024

IEEE Access

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To evaluate the ability of space optical systems to suppress off-axis stray light, this paper proposes a stray light testing method for large-field of view, multispectral spatial optical systems based on point source transmittance (PST). And a stray light testing platform was developed using a high-brightness simulated light source, large-aperture off-axis reflective collimator, high-precision positioning mechanism and a double column tank to evaluate the stray light PST index of spatial optical system. On the basis of theoretical analyses, a set of calibration lenses and stray light elimination structures such as hoods, baffle and stop are designed for the accuracy calibration of stray light testing systems. The theoretical PST values of the calibration lens at different off-axis angles are analyzed by Trace Pro software simulation and compared with the measured values to calibrate the accuracy of the system. The testing results show that the PST measurement range of the system reaches 10 -3 ~10 -10 when the off-axis angles of the calibration lens are in the range of ±5°±60°. The stray light test system has the advantages of wide working band, high automation and large dynamic range, and its test results can be used in the correction of lens hood and other applications.INDEX TERMS Multi-spectrum, large-field view, stray light, point source transmittance (PST), lens hood

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Section: B Analysis Of the Surface Radiation Energy Transfer Modelmentioning

confidence: 99%