The lasers arrived on the 10th November..... thats bloody fast going .... i think i asked you to ship on the 7th
so well done to the shipper and UPS ....
got them on the bench today to test....
these are my findings ....
Powered up the red first
this was purchased and marked as a 400 mW 635nM Diode laser
Now first impresion on powering up with the attenation inut set to 5v, was " that is f***ing Bright " even in daylight. The beam was quite fat ( about 8mm ) but i was ready for that as every one i know who has these 635 diodes has the same issue but as there is only one diode inside the head i wont have to keep realigning the multiple beams ( unlike the actos units ) also as i will mostly be using this rig for beamshows, its not to much of an issue
I tested the output with 2 power meters both calibrated against known sources. i use a Gentec TPM 300 as my main meter which has both analogue and digital display
Right Now for the very good bit ...... after powerup for 5 min the output was reading 662 mW now i thought the beam looked bright but .... WOW ..... so i double checked it with my other Meter .... reads 660 mW
So conclusion of this test is " it is f***ing Bright " for what was suposed to be a 400mw unit and im very pleased
Next the Blue
The blue was purchased and marked as a 473nM 150mW DPSS
I connected the blanking analogue input to a lab PSU that has a varable 4 to 6v output
powered up and set the PSU to 4v .... the beam looked very tight and very little scatter
at 4 v the output was reading 128mW turned up to 5v = 148 mw ... anythingabove 5.5v the output would not increase above 152mW .... left to run for 5 min ..... and the beam looked exceptionaly good and very stable ....
next the Green.
The Green was purchased as a 450mW 532nM, but arrived Marked as a 500mW unit
Connected the Analogue blanking input to the PSU set at 4V and powered up the laser ..... I was really suppised at the VERY tight beam even over 20Mtrs ( 60ft ) distance .... when i took a reading with the power meter it read 239mW @ 4v
this seemed a bit on th low side so i left it running for 5 min to stablise .... on returning it was reading 240mw @ 4V not much difference ..... so i upped the attenuation voltage to 5V and the power shot up to 408mW so then i wound the power to 5.5v and the power went to 520mW and at 6v it was 560mw as my PSU at hand did not go any higher im not sure if this is the max output .... Although im more than pleased with the output and beam, the attenuation range is a bit non linear and all the action seems in the upper area of the 0 -6v range although im sure i can get around this with some offset and scaling opamps .....
So the green far exceeded the spec and may be even able to do more as im not quite sure what the max attenation voltage will go to ...... but i dont want to pop the input
Over all the results have been Excellent ...... the lasers arived promptly and Quickly and the build quality exceeds anything that i have had from china before. and the communication from you has been really really good.
Thank you very much for your help and great service
all the best ..... Karl Dawson