本帖最后由 qhyphoto 于 2017-10-12 21:50 编辑
原文：
New camera has arrived for beta testing. It is preproduction camera with modified debayered sensor from QHY168C camera and this is the only difference.
QHY168M was defined as QHY168C on connection to PC and this information was also included in fits file. This will be corrected in nearest future.
First tests were made to compare the sensitivity with QHY168C and find PROs and CONs.
I used Astronomik Lumi flat-field panel as a white light source and Astronomik LRGB filters set. Gain and offset settings were taken from QHY168C and were based on unity gain. Both cameras were measured on the same exposure to receive about 21000 counts on the QHY168C
I shoot the images on color camera with RGB filters then I took corresponding channel from each image to compare it to the image from mono camera, which was taken with the same filter.
First thing that I found out that color sensor with native bayer has a significalt leakage. It has 94% leakage to green in red filter, 24% to blue and 14% to red in green filter, and 36% to green and 7% to red in blue filter.
I was really descouraged with it!
In comparison with QHY168C the results are quite interesting particularly in connection to the loss of microlenses. I found the small decreese in sensitivity in blue and green (12,2% and 6,3%) which is not critical but... significant increase in red up to 32% which is important for Ha and SII
The L channel increase was measured as 60% - awesome!
The field tests are coming soon.
Generally speaking, the camera is very promising. It has AR+AR glass and has no anti-moire filter. This will help to receive more detailed contrast image.
You can also find custom flange on QHY filter wheel with custom off-axis guider to have correct focal path with Paracorr type2.
译文：
新相机已经入手，我对它进行了一些初步的测试。QHY168M和QHY168C唯一的不同之处在于QHY168M的CMOS芯片移除了拜耳滤镜，也就是说QHY168M是QHY168C无拜耳滤镜的版本。 QHY168M在连接电脑时依然会错误地显示为QHY168C，此信息也会包含在fit文件中。未来很快就会得到纠正。 首先进行的测试对灵敏度与QHY168C进行了比较，从而发现去除拜尔滤镜后的好处和坏处。 我使用Astronomik Lumi平场面板作为白色光源，配合使用Astronomik LRGB滤镜组。增益和偏置设置取自QHY168C，基于其单位增益。在相同的曝光下测量两台相机接收大约21000个ADU。 我先是在彩色相机上使用RGB滤镜拍摄图像，接着使用相同的滤镜在黑白相机上拍摄图像，然后从彩色相机拍摄的每个图像中将相应通道的数据信息提取出来与黑白相机拍摄的图像进行对比。 首先我发现带有拜耳滤镜的CMOS传感器有一个重要的泄漏。红色滤光片有94％的绿色渗透，绿色滤光片的蓝色为24％，红色为14％，蓝色滤光片的红色为36％，绿色为7％。我感到非常气馁。(译者注：因为彩色相机的BAYER过滤镜并不是干涉滤光片，因此对色彩的截止程度不是非常高，导致了彩色CCD的这种颜色渗透。另一方面，是彩色相机的BAYER过滤滤镜，在颜色的交叉上点上设计得比较平缓，而不像天文RGB滤镜的曲线那么陡峭，也导致了颜色的渗透） 与QHY168C相比，测试结果非常有趣，这主要是由微透镜的去除引起的。对于蓝色和绿色的灵敏度分别降低（12.2％和6.3％），这并不重要…重要的是对于红色的灵敏度增加了大约32％，对于Ha和SII而言非常重要。 L通道增加约60％ - 棒极了！ 实地测试即将进行。 整体来说，新相机的表现是非常乐观的。它有AR + AR玻璃，而没有摩尔纹消除滤镜。这将有助于获得细节更多对比度更高的图像。 在下面的图片中您还可以看到定制接环用来连接滤镜轮，偏轴导星镜，以及Paracorr type2改正镜。
原文地址：http://qhyccd.com/bbs/index.php? ... 3fm4j3&topic=6127.0
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