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Entry  Fri May 31 01:38:21 2019, Kruthi, Update, Cameras, Telescope telescope_mug_image.pdf
    Reply  Mon Jun 3 16:40:48 2019, rana, Update, Cameras, Telescope 
Message ID: 14644     Entry time: Fri May 31 01:38:21 2019     Reply to this: 14646
Author: Kruthi 
Type: Update 
Category: Cameras 
Subject: Telescope 

[Kruthi, Milind]

Yesterday, we were able to capture some images of objects at a distane of approx 60cm (see the attachment), with the GigE mounted onto the telescope. I think, Johannes had used it earlier to image the ETMX (https://nodus.ligo.caltech.edu:8081/40m/13375). His elog entry doesn't say anything about the focal length of the lenses that he had used. The link to the python code he had used to calculate the lens solution wasn't working. After Gautam fixed it, I took a look at it. He has used 150mm (front lens) and 250mm (back lens) as the focal length of lenses for the calculation. Using the lens formula and an image of a nearby light source, with a very rough measurement, I found the focal lengths to be around 14 cm and 23 cm. So, I'm assuming that the lenses in the telescope are of same focal lengths as in his code, i.e 150mm and 250mm.

Attachment 1: telescope_mug_image.pdf  194 kB  Uploaded Mon Jun 3 18:17:31 2019  | Hide | Hide all
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