Post by Ron Walker on Apr 29, 2022 17:30:58 GMT -7
Posted by: Philostopher1 Jul 28 2017, 05:48 PM
Hello all!
In my on-going determination to build a quality optical projector under $2500, I have so far struggled with off the shelf camera lenses, fiber optics, light pipe homogenizers, distorted pinholes and everything short of chewing gum to eliminate square stars from readily available LEDs.
I just stumbled on the following. Nichia makes an hexagonal LED with a 3.5 mm foot print.
Here is a link to their site followed by a resource for individual components pre mounted.
www.nichia.co.jp/en/product/led_product_data.html?type=%27NVSW309A%27
www.mtnelectronics.com/index.php?route=product/product&product_id=830&search=319at
I ordered a few @ only $5- each. I'll post again after I test them.
Posted by: Ron Walker Jul 28 2017, 09:32 PM
Looking forward to your results.
Posted by: Philostopher1 Aug 9 2017, 10:25 PM
Update on Hexagonal LED emitter.
Here is the crude mount with led and lens. The lens is a 238 degree fisheye for a smartphone made by Mozeat. Under $20- on Amazon. It is a six element coated lens!
The led is a Nichia 319AT. The fisheye is absolutely necessary to achieve smaller stars. I ordered a good integrating rod to homogenize the luminosity of the LED. This will help get the light integrated into a 2mm "point". From here things should be pretty acceptable.
I am still tooling up and have a lot to do.
I needed a tripod for the last one. I couldn't hold my tablet still enough. Also it photographs much more blue than in person. This LED is 5000k it's a nice white. You may notice some chromatic aberration on the edges of the stars. I am using uncoated lenses for now.
Posted by: Ron Walker Aug 10 2017, 11:28 AM
Looking Good!
Hello all!
In my on-going determination to build a quality optical projector under $2500, I have so far struggled with off the shelf camera lenses, fiber optics, light pipe homogenizers, distorted pinholes and everything short of chewing gum to eliminate square stars from readily available LEDs.
I just stumbled on the following. Nichia makes an hexagonal LED with a 3.5 mm foot print.
Here is a link to their site followed by a resource for individual components pre mounted.
www.nichia.co.jp/en/product/led_product_data.html?type=%27NVSW309A%27
www.mtnelectronics.com/index.php?route=product/product&product_id=830&search=319at
I ordered a few @ only $5- each. I'll post again after I test them.
Posted by: Ron Walker Jul 28 2017, 09:32 PM
Looking forward to your results.
Posted by: Philostopher1 Aug 9 2017, 10:25 PM
Update on Hexagonal LED emitter.
Here is the crude mount with led and lens. The lens is a 238 degree fisheye for a smartphone made by Mozeat. Under $20- on Amazon. It is a six element coated lens!
The led is a Nichia 319AT. The fisheye is absolutely necessary to achieve smaller stars. I ordered a good integrating rod to homogenize the luminosity of the LED. This will help get the light integrated into a 2mm "point". From here things should be pretty acceptable.
I am still tooling up and have a lot to do.
I needed a tripod for the last one. I couldn't hold my tablet still enough. Also it photographs much more blue than in person. This LED is 5000k it's a nice white. You may notice some chromatic aberration on the edges of the stars. I am using uncoated lenses for now.
Posted by: Ron Walker Aug 10 2017, 11:28 AM
Looking Good!