QHYCCD QHY16200A, Руководство пользователя

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QHY16200A
4. What's small display on the camera for?
The OLED display is used for display certain formation related to the shooting. It is
directly driven by application program. So it may display different information or
doesn't display anything at all based on different application programs. Currently all
application program don't support this display, please wait for latest application
program that supports this display.
5. What is defect columns?
You may see one or more vertical columns whose top pixel is a bright dot. Normally
speaking such columns are not defect column. It is resulted from one pixel with high
thermal current. All the pixels below that pixel will be affected by it as thermal
current is transferred through that pixel.
This pixel can be removed by dark frame calibration. If they cannot be eliminated
entirely, you can solve this problem by using some astronomical image processing
software. These software will replace that column with the average value of its
surrounding columns.
Aside from the columns we just talked about, you may see one or more black
columns which is not full sensitive to the light or it is dim to light. This is the defect
column and it cannot be removed by dark frame calibration. The KAF16200 sensor
has two grade, grade1 and grade2. From the specification of the datasheet, the
grade 2 allows some defect columns. For more information about this please check
KAF16200 datasheet. You can use the "defect tools" in some image process software
to remove such defect columns as well.
The following image shows a typical "defect" columns caused by a hot pixel, which is
not very bright and it is usually not considered as a defect column. It will be gone
after dark frame calibration.