Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

Rayfoss 635nm lasers - Possibly better divergence?






Pretty much all the corrective optics I know of need to go after the collimating lens. From the picture, there doesn't look to be any room after the lens.

201111313138907.jpg


The exception would be a FAC lens installed on the die facet, but I seriously doubt they went to the trouble of de-canning and mounting something that requires a great deal of precision.
 
If these have improved divergence I'll be getting one, but i fear Trevor is correct, just a Chinese typo that happens to make what they're selling look better than the competitors...:(
 
Reminds me of this:
201010432638400.jpg

That host definitely doesn't have corrective optics.
 
Cyparagon said:
Pretty much all the corrective optics I know of need to go after the collimating lens. From the picture, there doesn't look to be any room after the lens.

201111313138907.jpg


The exception would be a FAC lens installed on the die facet, but I seriously doubt they went to the trouble of de-canning and mounting something that requires a great deal of precision.
Click to expand...

I've seen cylindrical optics used mostly after initial collimation, but I've also seen anamorphic prisms used both before that point or after.

Sellers will often list divergence on the slow axis since it's a better number to show. They do the same thing with 445nm diode listings.
 
I asked Rayfoss about their 635nm lasers, and apparently the divergence listed was a mistake. They did not specify whether they used corrective optics or not, but it was insinuated that they are not in the lasers. All the listed divergence values seem to have changed to 1.8 milli-radians. Closer to a realistic figure, but not quite accurate (maybe they are simply averaging the slow and fast axis).

That being said, they are not unreasonably priced considering the price of these laser diodes - but they are not priced mindful of their competitor (O-like has a similar power 635nm laser for less).

Thanks,

AAlasers
 
Last edited:
You must log in or register to reply here.





Back
Top