The 80026 Mercury Cadmium Telluride (MCT) detector’s broad spectral response extends into the mid-IR region. This liquid nitrogen cooled detector measures signals approximately 100 times weaker and acquires data about 8 times faster than Oriel’s 80008 room temperature DTGS detector. Liquid nitrogen holding time is eight hours. A two-stage, low noise amplifier is built into the housing and requires no user adjustments. An off-axis parabolic reflector is integrated into the design, rather than a focusing lens. IR refractive optics are expensive and have transmittance limitations. Using this type of reflector provides several advantages. Its gold coating enhances IR reflectance. The focal point is displaced from the mechanical axis, giving full access to the reflector focus area. There is no shadowing with the detector’s active area positioned at the focal point. A manually adjustable iris is included with the 80026. Its diameter range is from 0.8" to 1.4" (2 to 36 mm). The iris can act as a Jacquinot Stop. By decreasing the effective source size and reducing the spot size on the detector, the resolution increases. The iris uses standard Oriel 1.5-Inch Series male and female flanges, allowing it to be easily integrated into the FT-IR system, if desired.


80026汞碲化镉(MCT)探测器的宽光谱响应扩展到中红外区域。这种液氮冷却探测器测量的信号大约比Oriel的80008室温DTGS探测器弱100倍，获取数据快8倍。液氮保持时间为8小时。一个两级，低噪音放大器内置在外壳，不需要用户调整。设计中集成了一个离轴抛物面反射器，而不是聚焦透镜。红外折射率光学是昂贵的，并具有透射率的局限性。使用这种类型的反射器有几个优点。它的金涂层增强了红外反射率。焦点从机械轴移开，完全进入反射器焦点区域。探测器的活动区域位于焦点上，没有阴影。80026配有手动调节虹膜。其直径范围为0.8“至1.4”(2至36毫米)。虹膜可以作为按摩器的停止部分。通过减小有效源尺寸和减小探测器上的点尺寸，提高了分辨率。虹膜采用1.5英寸标准腔的内外法兰，如果需要，可以很容易地集成到FT-IR系统中。