Awhile ago I picked up an old Kodak optical comparator, the main bulb (6V 100W) was blown and while still available as NOS was quite pricey. I modded and installed a 100W Halogen bulb instead. Fast forward a couple of years it would appear my retrofit was not done wisely as the first lens closest to the bulb has cracked and broken, most likely due to the more heat output.
I am wanting to retrofit a LED light in there. I found an old thread here where a person did a similar thing except on a different machine http://www.candlepowerforums.com/vb/showthread.php?297160-Optical-comparator-light-modification
Here is the patent very similar to the machine I have https://www.google.com.au/patents/US2552238 It shows that the first lens system is a condensor. Here is a machine near identical to mine showing the light throw www.ebay.com/itm/Kodak-14-034-Mod-3...ator-Fixed-Stage-Inspection-Jig-/311862059231
Are there any suggestions for a suitable LED chip to install to replace the halogen light? I do have some new lenses to replace the broken one, but I know LED's throw light differently to incandescent.
I am wanting to retrofit a LED light in there. I found an old thread here where a person did a similar thing except on a different machine http://www.candlepowerforums.com/vb/showthread.php?297160-Optical-comparator-light-modification
Here is the patent very similar to the machine I have https://www.google.com.au/patents/US2552238 It shows that the first lens system is a condensor. Here is a machine near identical to mine showing the light throw www.ebay.com/itm/Kodak-14-034-Mod-3...ator-Fixed-Stage-Inspection-Jig-/311862059231
Are there any suggestions for a suitable LED chip to install to replace the halogen light? I do have some new lenses to replace the broken one, but I know LED's throw light differently to incandescent.