Abstract:
A solar simulator includes a light source, an optical reflection element positioned behind the light source to reflect light emitted from the light source in a form of pseudo parallel light, a low-angle light-diffusion optical element for diffusing the reflected light from the optical reflection element at a low diffusion angle, and a parallel light conversion optical element including a number of air holes arranged in parallel rows and provided with faculties for transmitting incident light parallel to the axis of the air holes to absorb or attenuate nonparallel incident light. The parallel light conversion optical element converts the incident light from the low-angle light-diffusion optical element to parallel light and emits the converted parallel light.
Abstract:
Provided are a light source evaluation device, a light source adjustment system, a light source evaluation system, and a light source evaluation method whereby it is possible to evaluate the characteristics of a solar simulator, which is a light source for measuring the characteristics of a solar cell, without creating a reference cell or pseudo cell tailored to the spectral sensitivity of a solar cell to be measured. Said evaluation is performed by calculating an evaluation value of the characteristics of the light emitted by a solar simulator in comparison to natural sunlight on the basis of the spectral irradiance of the light emitted by a solar simulator as measured by a spectroradiometer, the spectral irradiance of natural sunlight, and the pre-measured spectral sensitivity of the solar cell to be measured.
Abstract:
A radiance source (20) includes a housing (40) having an interior wall (42), wherein at least a spherical portion of the interior wall (42) of the housing (40) is spherical, an interior volume (46) and an exit port (48). A light source (82) is disposed within the interior volume (46) of the housing (40). A calibration structure (84) blocks and reflects a light ray that would otherwise travel directly from the light source (82) to the exit port (48) without reflecting from the interior wall (42). The calibration structure (84) has a calibration body (86) having a curved back surface (88) facing the light source (82) and a curved front surface (90) facing the exit port (48). There is an optically diffuse, lambertian reflecting surface (96) on at least the spherical portion of the interior wall (42) of the housing (40), the back surface (88) of the calibration body (86), and the front surface (90) of the calibration body (86).
Abstract:
A particulate detector (10) comprises a radiation source (12) arranged to emit radiation in at least first and second predetermined wavebands towards a sampling region (18) suspected of containing particulates, and a detection element (14), shielded from the radiation source (12), and arranged to detect radiation from the sampling region (18) at least first and second instances. The radiation source (12) is such that the emissions in the wavebands temporarily overlap. The detector is such that, at the instances at which the radiation is detected, the relative contributions from the emissions in each predetermined waveband are distinguishable, thereby allowing characteristics of the particulates to be determined. The radiation source (12) may comprise a light emitting diode (24).