根据刑侦、物证等领域的应用要求，研制了一种工作波段为254~380 nm的大孔径傅里叶变换成像光谱仪。该系统采用具有高光通量的时间空间调制型结构以解决现有系统能量不足的问题。系统采用像平面式干涉仪与全反射式Offner成像镜相配合的方案，可实现干涉图上光程差近似线性分布。其在紫外波段最大可获得光程差与空间调制型干涉结构相同，理论最大波数分辨率为80 cm-1。系统前置物镜、分光立方体为熔石英材质，成像镜为全反射系统，在全工作波段内具有较高透射率。实验结果表明，系统可获取工作波段短波端附近的原始干涉图，能正确采集及重构目标的紫外波段光谱数据立方体；在使用汞灯照明时，可正确识别365 nm处发射峰。

According to the application requirements of criminal investigation and material evidence, a kind of large aperture ultraviolet (UV) Fourier transform imaging spectrometer is developed which works in the wavelength range of 254~380 nm. The time-spatial modulated structure with high flux is used for the prototype to overcome the problem of insufficient energy in existing systems. The prototype uses image plane interferometer combined with Offner imaging lens to achieve approximately linear distribution of optical path difference (OPD) on raw interferogram. The maximum OPD can be achieved as large as the spatial modulated interferometers in UV band, and the maximum resolution of wavenumber is 80 cm-1 in theory. As the front objective lens and the UV beam splitting cube are made of fused silica and the imaging lens is catoptric, the transmittance is high in the whole working waveband. The experimental result shows that the raw interference pattern can be taken by the prototype on the short wave end. The spectral image data cube can also be taken and rebuilt correctly. The prototype can identify the emission peak at 365 nm when the mercury lamp is used as the illuminator.