Register    Login    Forum    Search    FAQ

Board index » Products » Cameras




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post Posted: Tue Nov 14, 2017 6:27 pm 
Offline

Joined: Thu Apr 21, 2016 7:41 am
Posts: 4
Hello Forum,

I am using a ASI1600MM-C for nearly one year with great success. Last month I discoverd a very strange behaviour around bright stars. Estimations of the light path lead to the conclusion that it is
scattered light from the cover glass or the chip itself. Reflected by the filters in the filter wheel.

It is mostly seen with reflectors, and occured with ZWO and Baader filters (in right direction). It is seen heavy on narrowband filters but is still present on broadband LRGB-filters.

Is there a replacement glass available or a trick to reduce this strange backscattered light

Vega 60s with a 8" f/5 Newton, Baader H-Alpha Filter
Attachment:
Chip-or-Cover-Glass-Reflexion.jpg
Chip-or-Cover-Glass-Reflexion.jpg [ 477.89 KiB | Viewed 116 times ]


Thomas


Top 
 Profile  
Reply with quote  
 Post Posted: Wed Nov 15, 2017 12:58 pm 
Offline
User avatar

Joined: Thu Feb 21, 2013 2:51 am
Posts: 2279
sorry only sensor factory can do something with the sensor
but you can let the sensor face the opposite of the filter wheel
so the distance from sensor to filter is longer
then refection should less

_________________
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China


Top 
 Profile  
Reply with quote  
 Post Posted: Wed Nov 15, 2017 6:58 pm 
Offline

Joined: Thu Apr 21, 2016 7:41 am
Posts: 4
Sam wrote:
sorry only sensor factory can do something with the sensor
but you can let the sensor face the opposite of the filter wheel
so the distance from sensor to filter is longer
then refection should less


Ok, that light is scatterd from the Chip not from the glass of the ccd chamber, isn't it?
So, it is not usefull to change that glass.


Top 
 Profile  
Reply with quote  
 Post Posted: Tue Nov 21, 2017 1:52 pm 
Offline
User avatar

Joined: Thu Feb 21, 2013 2:51 am
Posts: 2279
the protect window of the camera is AR coated
so I think the reflexion is come from the sensor glass which is not coated

_________________
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China


Top 
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  [ 4 posts ] 

Board index » Products » Cameras


Who is online

Users browsing this forum: Bing [Bot] and 7 guests

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: