Light lost in aspheric lens flashlight

35 posts / 0 new
Last post
djozz
djozz's picture
Offline
Last seen: 54 min 9 sec ago
Joined: 09/07/2012 - 17:04
Posts: 15943
Location: Amsterdam

Very good result with the new lens! Well done!

Theodore41
Offline
Last seen: 22 hours 45 min ago
Joined: 02/20/2016 - 12:57
Posts: 963
Location: Athens Greece.

EasyB wrote:
Thanks for pointing out your measurements; I had come across them before but forgot about them. I think this really emphasizes the need for pre collimator lenses in these flashlights.
I have a small lens with AR coating in mind. Probably the 9mm diameter lens with 9mm FL from here:
http://www.anchoroptics.com/catalog/product.cfm?id=368
Not super cheap at $19, but I think these lenses are quality.

link does not open.
EasyB
Offline
Last seen: 8 hours 55 min ago
Joined: 03/09/2016 - 15:24
Posts: 1704
Location: Ohio
Theodore41 wrote:
EasyB wrote:
Thanks for pointing out your measurements; I had come across them before but forgot about them. I think this really emphasizes the need for pre collimator lenses in these flashlights. I have a small lens with AR coating in mind. Probably the 9mm diameter lens with 9mm FL from here: http://www.anchoroptics.com/catalog/product.cfm?id=368 Not super cheap at $19, but I think these lenses are quality.
link does not open.

Looks like the anchor optics site no longer exists. Edmund optics has a lot of the same stuff for similar prices. The lens that worked best for me is a 15mm diameter, 15mm FL plano convex lens with AR coating.

Theodore41
Offline
Last seen: 22 hours 45 min ago
Joined: 02/20/2016 - 12:57
Posts: 963
Location: Athens Greece.
EasyB wrote:
Theodore41 wrote:
EasyB wrote:
Thanks for pointing out your measurements; I had come across them before but forgot about them. I think this really emphasizes the need for pre collimator lenses in these flashlights. I have a small lens with AR coating in mind. Probably the 9mm diameter lens with 9mm FL from here: http://www.anchoroptics.com/catalog/product.cfm?id=368 Not super cheap at $19, but I think these lenses are quality.
link does not open.

Looks like the anchor optics site no longer exists. Edmund optics has a lot of the same stuff for similar prices. The lens that worked best for me is a 15mm diameter, 15mm FL plano convex lens with AR coating.


Thank you.

Pages