Abstract: An IR camera based on a Rockwell 256 $MUL 256 HgCdTe (NICMOS III) array has been recently acquired by the U.S. Naval Observatory as part of a program to evaluate the astrometric characteristics of current-generation IR arrays. Results of a pixel-by-pixel photometric evaluation of this HgCdTe device are presented. Overall, the array is of extremely high quality with less than 100 (0.2%) photometrically unusable pixels. With a fairly stringent photometric selection based on linearity and full well, the bad pixel count is about 420. The average pixel photometric response is linear to within about 1.6% rms over a range of 0 - 120,000 e$+$MIN$/; using a quadratic relation reduces the calibration errors to under 1% rms. For comparison, the results of a similar test with a Texas Instruments TI800 $MUL 800 CCD (a prototype of the HST WF/PC 1) are shown. !7
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机译：摘要：美国海军天文台最近购买了一种基于Rockwell 256 $ MUL 256 HgCdTe（NICMOS III）阵列的红外摄像机，作为评估当前IR阵列天体特性的程序的一部分。给出了此HgCdTe器件逐个像素的光度评估结果。总体而言，该阵列具有极高的质量，不到100个（0.2％）的光度学无法使用的像素。通过基于线性度和完全良好的相当严格的光度选择，不良像素数约为420。在0-120,000 e $ + $ MIN $ /的范围内，平均像素光度响应在rms范围内呈线性，约为1.6％。使用二次关系可将校准误差降低到1％rms以下。为了进行比较，显示了使用德州仪器TI800 $ MUL 800 CCD（HST WF / PC 1的原型）进行的类似测试的结果。 ！7
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