Genda H, Okayama H
Appl Opt. 1977 Mar 1;16(3):601-6. doi: 10.1364/AO.16.000601.
A field-averaging spectrograph camera utilizing a continuous interference filter and a step tablet has been investigated and its characteristics measured. Using color patches, the values obtained with the camera are compared with those obtained by a spectroradiometer and a self-spectrophotometer. The results obtained with the photographic method show slightly higher values than those of the other methods in the measured wavelength region. In the measurement of spectral reflectances of two-color patches with different ratios of area within a field of view angle, the same reversal point of the relative reflectance curves is observed with this camera as the spectroradiometer. Therefore, the function of a field-averaging spectrograph camera is the same as a spectroradiometer, which is widely used for remote sensing applications at the present time. Moreover, it is more compact, portable, and lower priced than conventional instruments. The spectral reflectances of scenes were measured by photographic and spectroradiometer methods in field experiments. The spectral image of soil photographed by a beam split camera used with the field-averaging spectrograph camera is displayed in false color.
对一种利用连续干涉滤光片和阶梯平板的场平均光谱仪相机进行了研究并测量了其特性。使用色标，将相机获得的值与光谱辐射计和自分光光度计获得的值进行比较。在测量波长范围内，摄影方法获得的结果略高于其他方法。在用该相机测量视场角内具有不同面积比的两个色标的光谱反射率时，观察到相对反射率曲线的反转点与光谱辐射计相同。因此，场平均光谱仪相机的功能与目前广泛用于遥感应用的光谱辐射计相同。此外，它比传统仪器更紧凑、便携且价格更低。在野外实验中，通过摄影和光谱辐射计方法测量了场景的光谱反射率。用场平均光谱仪相机与分束相机拍摄的土壤光谱图像以假彩色显示。
