Solar simulator
AssigneeWacom Co., Ltd.
InventorMasaki Kusuhara
Life of this patent
Estimating the term…
Abstract
A solar simulator produces synthetic spectral distribution characteristic with sufficiently high uniformity and repeatability and permits the intensity of output light to be varied without substantially deviating the spectral distribution of output light. The solar simulator includes filter means capable of eliminating the near infrared component from the light of a xenon short arc lamp and, extracting the near infrared component from the light of an incandescent filament lamp enable the two kinds of lights which are selected by the filter means to be directed coaxially to an integrating optical system.
Claims15
A solar simulator, comprising
- a xenon short arc lamp,
- an incandescent filament lamp,
- filter means capable of eliminating a near infrared component from the light emitted by said xenon short arc lamp and, at the same time, extracting a near infrared component from the light emitted by said incandescent filament lamp, and
- a single integrating optical system on which the light emitted by said xenon short arc lamp minus said near infrared component and the light of said near infrared component extracted by said filter means from the light emitted by said incandescent filament lamp impinge.
A solar simulator provided with a xenon short arc lamp, an incandescent filament lamp, filter means capable of eliminating a near infrared component from the light emitted by said xenon short arc lamp and, at the same time, extracting a near infrared component from the light emitted by said incandescent filament lamp, and a single integrating optical system on which the light emitted by said xenon short arc lamp minus said near infrared component and the light of said near infrared component extracted by said filter means from the light emitted by said incandescent filament lamp impinge, which solar simulator further comprises
- drive means for moving said incandescent filament lamp toward or away from a sample plane along the optical axis thereof,
- means for controlling electric current supplied to said xenon short arc lamp,
- a constant voltage power source for energizing said incandescent filament lamp,
- means for measuring the intensity of light from said xenon short arc lamp and the intensity of light from said incandescent filament lamp,
- means for comparing said measured intensities of light from said xenon short arc lamp and said incandescent filament lamp respectively, and providing an output representing a function of the comparison,
- means for calculating deviation of the output of said comparison means from a standard value, and
- means for selectively controlling at least one of said drive means for said incandescent filament lamp and said current control means for said xenon short arc lamp as a function of said deviation to null said deviation.
Dependencies are inferred from the claim text.