public:kitt_peak:bok_90:90prime:focus
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public:kitt_peak:bok_90:90prime:focus [2019/05/24 11:14] davner created |
public:kitt_peak:bok_90:90prime:focus [2019/09/05 11:35] (current) mel |
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| * Note the zero point for the LVDT scale is arbitrary and only relative motion should be considered.So for example, 0.756 above for LVDT_A is a position of (0.754 * -1322.5) = -997.2 microns. | * Note the zero point for the LVDT scale is arbitrary and only relative motion should be considered.So for example, 0.756 above for LVDT_A is a position of (0.754 * -1322.5) = -997.2 microns. | ||
| * Note the direction sign is reversed between actuator movement and the LVDT readout. | * Note the direction sign is reversed between actuator movement and the LVDT readout. | ||
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| + | ======How to use find focus for 90Prime from Azcam computer====== | ||
| + | - In the AzcamTool window on the Azcam computer make sure " | ||
| + | - On the Azcam computer, double click the desktop icon " | ||
| + | - In the blue window that opens, type " | ||
| + | - It will then ask you to enter how long you want your exposure to be. Choose an exposure time that works well with whatever filter you want to use, and make sure it's in the beam. The exposure time previously used will be in brackets[]. | ||
| + | - It will ask you how many images you want to take. Again the previous number of images is stored in brackets. | ||
| + | - It will ask you to enter how many focus counts you want to move. Again the previous number of focus count shifts is stored in brackets. | ||
| + | - It will ask you how many rows to shift the CCD detector. | ||
| + | - You will then have to wait until the script takes however many images you asked for. It will reset the focus back to what it was originally when it's done. You will see an image on Bart where stars will stack vertically either becoming larger donuts if you are moving away from focus, or smaller if you are moving towards focus. | ||
| + | - Once you do a sequence where you go through focus, you can do smaller steps around where you went through focus to find best focus. | ||
public/kitt_peak/bok_90/90prime/focus.1558721648.txt.gz ยท Last modified: 2019/05/24 11:14 by davner
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