Alaskan
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WTB opto mechanical Q switch for ND YAG
And......
Anyone have a large diameter aspheric lens suitable for laser beam collimation sitting around you want to sell, or know where I can find one? Looking for a 2 inch diameter or larger laser quality 4 lambda or higher accuracy aspheric lens, the larger the better.
I can find under one inch easy enough, one to two inches harder, three inches or more not. Even when looking on Edmund Optics web site I cannot find 3 inch or larger, not that I would pay their price, the prices are high enough for their 1 inch diameter aspherics.
Why Aspheric? Aspheric lenses are not uncommon for our laser pointers, true G2 lenses are aspheric, but in my opinion their drawback is their small 6mm diameter, but for projectors which use small galvo controlled mirrors, the beam diameter needs to be small, divergence taking a back seat. Since I'm not a projector hobbyist (yet) low divergence is more important.
Here's a cut and paste from Edmund Optics regarding this type of lens:
Aspheric Lenses are used to eliminate spherical aberration in a range of applications, including bar code scanners, laser diode collimation, or OEM or R&D integration. Aspheric lenses utilize a single element design which helps minimize the number of lenses found in multi-lens optical assemblies. Said another way, unlike conventional lenses with a spherical front surface, aspheric lenses have a more complex front surface that gradually changes in curvature from the center of the lens out of the edge of the lens. This reduction in total element count not only helps decrease system size or weight, but also simplifies the assembly process. Integrating aspheres into an application such as focusing the output of a laser diode may not only decrease total cost, but may also outperform assemblies designed with traditional spherical optical lenses.
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EDIT July 22nd 2016:
There is another optical item I am in search of, a small ~1/2 inch diameter IR PBS polarized beam splitter cube. I need one with AR coating for about 800nm, I can find them on Aliexpress for 50 dollars, plus another 40+ dollars shipping, or another one on ebay for close to 140 dollars but I don't want to pay that much. Here's the bay listing to give an idea of the specs I'm looking for:
Link: 1pcs 10mm Polarization Beam Splitter Cube PBS 600 1100nm A329 LW | eBay
Polarization beam splitter cube
Size: 10*10*10MM
Dimension tolerance: +/-0.1MM
Finish: 40-20
Type: Lambda/4
Wavelength: 600-1100NM (I need ~800nm)
Also, I still have not found a 3 inch diameter high quality 4/Lambda or better 3 inch aspheric lens, I am now looking for a 2 inch diameter but still need the high accuracy surface specs.
And......
Anyone have a large diameter aspheric lens suitable for laser beam collimation sitting around you want to sell, or know where I can find one? Looking for a 2 inch diameter or larger laser quality 4 lambda or higher accuracy aspheric lens, the larger the better.
I can find under one inch easy enough, one to two inches harder, three inches or more not. Even when looking on Edmund Optics web site I cannot find 3 inch or larger, not that I would pay their price, the prices are high enough for their 1 inch diameter aspherics.
Why Aspheric? Aspheric lenses are not uncommon for our laser pointers, true G2 lenses are aspheric, but in my opinion their drawback is their small 6mm diameter, but for projectors which use small galvo controlled mirrors, the beam diameter needs to be small, divergence taking a back seat. Since I'm not a projector hobbyist (yet) low divergence is more important.
Here's a cut and paste from Edmund Optics regarding this type of lens:
Aspheric Lenses are used to eliminate spherical aberration in a range of applications, including bar code scanners, laser diode collimation, or OEM or R&D integration. Aspheric lenses utilize a single element design which helps minimize the number of lenses found in multi-lens optical assemblies. Said another way, unlike conventional lenses with a spherical front surface, aspheric lenses have a more complex front surface that gradually changes in curvature from the center of the lens out of the edge of the lens. This reduction in total element count not only helps decrease system size or weight, but also simplifies the assembly process. Integrating aspheres into an application such as focusing the output of a laser diode may not only decrease total cost, but may also outperform assemblies designed with traditional spherical optical lenses.
-----------------------------------------------------------
EDIT July 22nd 2016:
There is another optical item I am in search of, a small ~1/2 inch diameter IR PBS polarized beam splitter cube. I need one with AR coating for about 800nm, I can find them on Aliexpress for 50 dollars, plus another 40+ dollars shipping, or another one on ebay for close to 140 dollars but I don't want to pay that much. Here's the bay listing to give an idea of the specs I'm looking for:
Link: 1pcs 10mm Polarization Beam Splitter Cube PBS 600 1100nm A329 LW | eBay
Polarization beam splitter cube
Size: 10*10*10MM
Dimension tolerance: +/-0.1MM
Finish: 40-20
Type: Lambda/4
Wavelength: 600-1100NM (I need ~800nm)
Also, I still have not found a 3 inch diameter high quality 4/Lambda or better 3 inch aspheric lens, I am now looking for a 2 inch diameter but still need the high accuracy surface specs.
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