QHYCCD

Optic Back Focal Path data

QiuHY

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Optic Back Focal Path data
« on: January 20, 2016, 09:11:27 AM »
Hello,
 
       In order to get precision back focal data. We setup an optic system to measure it. This optic system can measure the silicon chip surface and any other surface with optic method. The distance is also includes all the index of the glass. It should be better than the mechanical measurement.

       The data includes all glass index like the optic window, ccd protect glass.
       The data does not include the filter's index if the camera has build-in colorwheel.

Here is the data:


QHY11  =  12mm
new QHY9 with adapter and light cover plate:  31.5mm
QHY21/22/23  =  17mm
QHY10  =  20mm  (just the camera, not include the center adjust ring)
QHY8L  =  20mm  (just the camera, not include the center adjust ring)
miniCAM5F = 20mm
QHY90A     =  30-31mm
QHY16200A = 33.5mm to 34mm
QHY695A with thin front part  =  29.5mm
QHY695A with standard front part = 33mm


QHY5III290=12mm



Best regards,
Qiu Hongyun








« Last Edit: October 30, 2017, 06:03:40 AM by QiuHY »
Qiu Hongyun

Re: Optic Back Focal Path data
« Reply #1 on: January 20, 2016, 10:04:14 AM »
Dr Qiu,
Great information!  The QHY9 should read with small filter wheel.  Measurements to include the small, Medium Ultra slim and standard need to be also given.  Or at least some reference to include the different filter wheels.  The all in one she indicate with or without the OAG.  Thanks for the info... Bruce
Bruce Morrell

Re: Optic Back Focal Path data
« Reply #2 on: January 20, 2016, 02:01:33 PM »
How about design a software to measure and analyze coma and vignetting effects on the image to determine the best back focus for any light train?

You did the PoleMaster, you can do it again.😆

Re: Optic Back Focal Path data
« Reply #3 on: January 30, 2016, 12:06:39 PM »
Hello,
what is the back focus for new QHY9M without glar shield and adapter please ?
I directly fixed color wheel (M) 7*36 on QHY9.

thanks

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Re: Optic Back Focal Path data
« Reply #4 on: December 05, 2016, 03:36:19 AM »
Hello

I would like you to confirm about back focus distance of QHY 90A. Because When got a first batch of 90A, the drawing specified 28mm. But now I see the number is "30-31"mm. So, I confused that. Can you confirm again what is the distance for QHY90A without OAG?

QiuHY

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Re: Optic Back Focal Path data
« Reply #5 on: December 05, 2016, 09:41:31 AM »
Hello,

         The QHY90A has two version front part. Before we use a thin front part so it is 28-29mm. Later we change to the standard front part and it become 30-31mm now.. 

         To know if your QHY90A the thin front part or the standard part. You can messure the total thickness of  camera and tell me.

Best regards,
Qiu Hongyun
Qiu Hongyun

Re: Optic Back Focal Path data
« Reply #6 on: February 20, 2017, 02:10:54 PM »
Dear Qiu,

Could you please provide the back focal path data for QHY168C? There is no such information in QHY168C User Manual reflected, chapter 11 is a blank page with no data...

Thank you in advance,

Oleg

Re: Optic Back Focal Path data
« Reply #7 on: February 24, 2017, 11:30:12 AM »
Hello,
 
       In order to get precision back focal data. We setup an optic system to measure it. This optic system can measure the silicon chip surface and any other surface with optic method. The distance is also includes all the index of the glass. It should be better than the mechanical measurement.

       The data includes all glass index like the optic window, ccd protect glass.
       The data does not include the filter's index if the camera has build-in colorwheel.

Here is the data:


QHY11  =  12mm
new QHY9 with adapter and light cover plate:  31.5mm
QHY21/22/23  =  17mm
QHY10  =  20mm
QHY8L  =  20mm
miniCAM5F = 20mm
QHY90A     =  30-31mm
QHY16200A = 33.5mm to 34mm
QHY695A with thin front part  =  29.5mm
QHY695A with standard front part = 33mm


QHY5III290=12mm



Best regards,
Qiu Hongyun

Thanks that's great. Can you do the same measurement on the QHY163M please.

Re: Optic Back Focal Path data
« Reply #8 on: February 25, 2017, 06:16:01 AM »
Hello,
 
       In order to get precision back focal data. We setup an optic system to measure it. This optic system can measure the silicon chip surface and any other surface with optic method. The distance is also includes all the index of the glass. It should be better than the mechanical measurement.

       The data includes all glass index like the optic window, ccd protect glass.
       The data does not include the filter's index if the camera has build-in colorwheel.

Here is the data:
Best regards,
Qiu Hongyun

And what about QHY183 and QHY168?

QiuHY

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Re: Optic Back Focal Path data
« Reply #9 on: February 28, 2017, 10:16:14 AM »
Hello,
        For QHY183C please look at the user manual of it. For QHY168C Our mechanical engineer is doing a drawing these days and we will post on the website of QHY168C in next week.

Best regards,
Qiu Hongyun
Qiu Hongyun

Re: Optic Back Focal Path data
« Reply #10 on: May 02, 2017, 08:37:08 AM »
Hello,
 
       In order to get precision back focal data. We setup an optic system to measure it. This optic system can measure the silicon chip surface and any other surface with optic method. The distance is also includes all the index of the glass. It should be better than the mechanical measurement.

       The data includes all glass index like the optic window, ccd protect glass.
       The data does not include the filter's index if the camera has build-in colorwheel.

Here is the data:


QHY11  =  12mm
new QHY9 with adapter and light cover plate:  31.5mm
QHY21/22/23  =  17mm
QHY10  =  20mm
QHY8L  =  20mm
miniCAM5F = 20mm
QHY90A     =  30-31mm
QHY16200A = 33.5mm to 34mm
QHY695A with thin front part  =  29.5mm
QHY695A with standard front part = 33mm


QHY5III290=12mm



Best regards,
Qiu Hongyun

Hello ,

Could you measure the newer models back focal ?
I have ordered a 367C , and have to make an adapter .

regards

Albert R

Re: Optic Back Focal Path data
« Reply #11 on: July 17, 2017, 11:16:06 AM »
Hello Qiu,

What is the exact backfocus of QHY16200A + CFW7? How about QHY16200 + CFW7 + included OAG? Is it the same with CFW5?
I've ordered QHY16200A few days ago from Korean dealer, and now designing a custom adapter for Tak FSQ.

Youn.
FSQ-106ED / FS-60CB / Samyang 135mm f2.0
QHY16200A / SBIG STF-8300M / QHY5L-IIM / Sony A7 II
CRUX-170HD / Kenko SkyMemo S

Re: Optic Back Focal Path data
« Reply #12 on: July 22, 2017, 10:02:58 PM »
Dear Dr. Qiu,

I can not find the backfocus distance of the QHY247C. The related page (11)  in the manual is empty...
Can you please provide the information?
Thank you in advance
BR
Waldemar
A lot of good stuff
and mostly bad weather

Re: Optic Back Focal Path data
« Reply #13 on: September 08, 2017, 05:12:57 PM »
Hello Qiu,

What is the exact backfocus of QHY16200A + CFW7? How about QHY16200 + CFW7 + included OAG? Is it the same with CFW5?
I've ordered QHY16200A few days ago from Korean dealer, and now designing a custom adapter for Tak FSQ.

Youn.

I have not found the answer to this anywhere.  Could someone please update with the answer?

QiuHY

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Re: Optic Back Focal Path data
« Reply #14 on: October 21, 2017, 10:14:38 AM »
Dear Dr. Qiu,

I can not find the backfocus distance of the QHY247C. The related page (11)  in the manual is empty...
Can you please provide the information?
Thank you in advance
BR
Waldemar


Hello,

       Please go to the QHY247C webpage and there is a table there. And there is the detailed drawing there.


Best regards,
Qiu Hongyun
Qiu Hongyun