Cool work C_k&Tom!
Today I finished a thrower project with Nicolaas’ TN31. It was already converted to an aspheric thrower by Kenji, now it has a new led on a 20mm board and a wavien collar. I did not make a lot of pictures because it was a mod for Nicolaas and I did not think about posting it before now.
The steps:
*a XP-G2 S4 2B old style was refowed on a 20mm DTP boardcand hot dedomed.
*the board was glued with Arctic Alumina Adhesive centered on the shelf in the TN31 (after the previous conversion the TN31 has a (sort of) flat 35mm diameter shelf).
*a contraption was made from soldered together brass rings for the collar (from Enderman’s group buy) to sit on the correct height, while clearing the led wires (the ring is upside down on the photo). The 4 posts were bit by bit sanded down until the focus of the collar was perfect, as tested with the led in moonlight mode.
*To handle the collar during all the adjustments deep inside the cavity (in-out-in-out etc.) I glued a copper handle on top of the collar with Norland64. The handle is not in the light path and was simply left in place inside the final modded light.
*after the focus was established as correct, the brass ring was glued on the shelf with a very thin layer of Arctic Alumina Adhesive to not alter the focus.
*two very small drops of Norland 64 were applied on the edge of the collar, the collar was placed on the brass ring, it was shifted until the reflected image of the die was perfectly projected on top of the die, then the Norland was cured with lots of 365nm UV light.
*With everything lightly glued into position, the TN31 was assembled with the aspheric lens to check if the beam was correct and as expected, which fortunately it was.
*Then the head was opened again and three generous blobs of hot glue (the hot 180degC version) were applied for a more permanent fixation of the wavien collar.
*made an effort to clean the aspheric lens as well as possible and closed the light.
We measured the modded TN31 as well as possible, even checking it against other modded throwers that I measured before to see if the setup was still correct, and we got 1.31 Mcd after 30 seconds, measured at 7 meter distance ( ). That is an almost exact doubling of throw compared to before adding the collar (650 kcd).
Having used my own collar on a White Flat, my catious conclusion is that the gain of the collar on a dedomed XP-G2 is a bit higher than on a White Flat, possibly close to cancelling out the higher luminance of the White Flat. Of course the combined dedoming and collar effects cause the XP-G2 S4 2B emit a very green tint. But with 1.3Mcd out of a TN31 size light I begin to like that tint