Old 11-11-2014, 01:10 PM #1
Junior Member
 
Join Date: Nov 2014
Posts: 2
Rep Power: 0
DDnoob is on a distinguished road
DDnoob DDnoob is offline
Junior Member
 
Join Date: Nov 2014
Posts: 2
Rep Power: 0
DDnoob is on a distinguished road
Question Measuement power laser using solar cell

I measure power of a laser by using a solar cell. But, the current and voltgate from the solar cell are very small. So, can i add a amplicifier circuit or sth ?


DDnoob is offline   Reply With Quote








Old 11-12-2014, 12:22 AM #2
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,028
Rep Power: 3212
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,028
Rep Power: 3212
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Measuement power laser using solar cell

No. Not really. The response of a photovoltaic is not linear with respect to power and the response also varies drastically between measured wavelengths, and even between different photovoltaic designs. The output is also sensitive to angle of incidence.

You won't get consistent results.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 11-12-2014, 01:00 AM #3
Junior Member
 
Join Date: Nov 2014
Posts: 2
Rep Power: 0
DDnoob is on a distinguished road
DDnoob DDnoob is offline
Junior Member
 
Join Date: Nov 2014
Posts: 2
Rep Power: 0
DDnoob is on a distinguished road
Default Re: Measuement power laser using solar cell

Quote:
Originally Posted by Cyparagon View Post
No. Not really. The response of a photovoltaic is not linear with respect to power and the response also varies drastically between measured wavelengths, and even between different photovoltaic designs. The output is also sensitive to angle of incidence.

You won't get consistent results.
Thanks, you can give me a giude about using solar cell? i think it a cheap LPM what i can do
DDnoob is offline   Reply With Quote
Old 11-12-2014, 03:40 AM #4
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 753
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Things Things is offline
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 753
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Default Re: Measuement power laser using solar cell

You can't, is what he was saying. The cheap ones use thermoelectric/peltier devices with a coating, but even those need calibration. Unless you have a LPM to calibrate against, it won't read accurately.
Things is offline   Reply With Quote
Old 11-12-2014, 03:51 AM #5
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1087
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1087
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: Measuement power laser using solar cell

Quote:
Originally Posted by DDnoob View Post
Thanks, you can give me a giude about using solar cell? i think it a cheap LPM what i can do
Did you even read his post...?

Don't use a solar cell, as things said, use a TEC. See: DIY Thermal LPM for under $50
ARG is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes




Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 11:10 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC