McAllan
Enlightened
Hi photon lovers
Can't decide where to put this thread. Here or in the LED section. So sorry if I've put it wrong. But this probably appeals more to the DIY type and is a bit technical.
If you're like me then you like taking old things apart and ripping the most interesting/usable stuff in them before they're finally going to the recycle plant.
Had an old combined printer/scanner using an obsolete interface. Decided to rip it for motors and parts and in the scanner I found a very nice high quality lens. Not very big but quality is outstanding(!). Can be used as a loupe with a quality of a very expensive one. If my guess is right the lense is not achromatic but apochromatic - the finest lenses available.
The lens and a piece of card board to hold it so it won't go foggy because of finger moist and to block light going aside of it. CR123A cell for size comparison.
That lens can also be used to project the image of a turned on LED die on a white wall. A bit like what's happening in a projector. And because it's both aplanatic and apochromatic it can project a very clear image on a white wall. I'm really sorry I'm not able to take better pictures because they don't do the result justice. Pictures are taken with daylight white balancing.
Neutral White 4500 kelvin emitter in my Fenix TK20. The red spots are much clearer in reality. They're what lowers the efficiency a little but make the LED make much more light in the red spectrum than cool whites.
Cool white emitter in Fenix LD20. As you can see no spots of red here.
Both lights using Cree XR-E emitters.
For info I can tell that I estimate the lens to magnify about 10x. I have two achromatic loupes 10x and 20x and this lens magnifies the same or very close to the 10x. The funny thing is my loupes was (imho) very expensive German ones (at least of brand name). The 20x requires the LED to0 be too close for most lights but the 10x nowhere competes in the image quality of the scanner lens. Might make a handle for it someday so that it'll become a real loupe - if I ever get the time
Hope you've enjoyed the images and have gotten some inspiration to play a little with your own lights. There's nothing like letting the inner child go free. And please remember - the only difference between boys and men are the price of their toys :wave:
Can't decide where to put this thread. Here or in the LED section. So sorry if I've put it wrong. But this probably appeals more to the DIY type and is a bit technical.
If you're like me then you like taking old things apart and ripping the most interesting/usable stuff in them before they're finally going to the recycle plant.
Had an old combined printer/scanner using an obsolete interface. Decided to rip it for motors and parts and in the scanner I found a very nice high quality lens. Not very big but quality is outstanding(!). Can be used as a loupe with a quality of a very expensive one. If my guess is right the lense is not achromatic but apochromatic - the finest lenses available.
The lens and a piece of card board to hold it so it won't go foggy because of finger moist and to block light going aside of it. CR123A cell for size comparison.
That lens can also be used to project the image of a turned on LED die on a white wall. A bit like what's happening in a projector. And because it's both aplanatic and apochromatic it can project a very clear image on a white wall. I'm really sorry I'm not able to take better pictures because they don't do the result justice. Pictures are taken with daylight white balancing.
Neutral White 4500 kelvin emitter in my Fenix TK20. The red spots are much clearer in reality. They're what lowers the efficiency a little but make the LED make much more light in the red spectrum than cool whites.
Cool white emitter in Fenix LD20. As you can see no spots of red here.
Both lights using Cree XR-E emitters.
For info I can tell that I estimate the lens to magnify about 10x. I have two achromatic loupes 10x and 20x and this lens magnifies the same or very close to the 10x. The funny thing is my loupes was (imho) very expensive German ones (at least of brand name). The 20x requires the LED to0 be too close for most lights but the 10x nowhere competes in the image quality of the scanner lens. Might make a handle for it someday so that it'll become a real loupe - if I ever get the time
Hope you've enjoyed the images and have gotten some inspiration to play a little with your own lights. There's nothing like letting the inner child go free. And please remember - the only difference between boys and men are the price of their toys :wave:
