P60 Aspheric??

With the myriad of P60 hosts and dropins, does anybody make a P60 aspheric lens? If so what are the results? Thanks.

There's a DX $2.00 lens (28mm) that seems to work fairly well. I have one on the way and I have a similar one from another light that I've played around with.

I haven't heard of a dedicated drop-in with a lens specifically designed around it.

Thanks gcbryan. I wasn't really thinking of a dropin with the aspheric combined but a separate lens that could be placed in front. I did find this http://flightinwinter.com/aspheric-flashlight-lens-28mm-p-420.html , it might be the same as what you found on DX.

It does look like it's probably the same. Put that in a P60 host with a XR-E R2 and it should throw pretty well.

I tried it before and its really nothing special. The P60 lens diameter is way to small to be an effective aspheric host. A LOT of emitter lumens are lost illuminating the inside walls of the bezel, and never make it OTF. I would guess OTF Lumen output is less than 50% of the emitter lumens.

^Gurthang said:

Looking at the Malkoff design makes me wonder if a narrow TIR optics would out-throw vs. an aspheric lens at the P60 size?

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A narrower TIR should outthrow a wider degree one. I think the TIR used in the M60 is a 5 degree... but dont quote me on that, its been a while since I read the datasheet.

gcbryan said:

There's a DX $2.00 lens (28mm) that seems to work fairly well. I have one on the way and I have a similar one from another light that I've played around with.

I haven't heard of a dedicated drop-in with a lens specifically designed around it.

Click to expand...

So far I have bought five of them from DX and KD, three of them were OK and
two were bad.

IIRC the two bad one were from DX.

Please tell us about if you get yours from DX.

tl

Looks like there's not much around with such a short focal length.

In spite of its limitations I think it would be worthwhile to make an aspheric to suit the P60 format and I'd like to make one with a view to making it commercially available, if it works well enough. (I realize a TIR lens would have much higher potential but is more difficult to design and more difficult to mould. Maybe later).

To cater for the most popular drop ins I could use some help. I need some drop in measurements, whatever anyone is using.

- outside and inside diameters at the front (at the lens seat)
- right angle distance from front of drop in to tip of LED bulb
- LED bulb diameter
- and if you are still with me, best estimate of distance from front to LED emitter


Graham.P

Ahorton has beat you to he punch. He has made available a short focal length aspheric lens with a kit that has a pill holder that you screw your own P60 pill into. You can buy the lens by itself or buy the kit. The focal length is around 10mm.

PCC said:

Ahorton has beat you to he punch. He has made available a short focal length aspheric lens with a kit that has a pill holder that you screw your own P60 pill into. You can buy the lens by itself or buy the kit. The focal length is around 10mm.

Click to expand...

Thanks PCC. Had a look a Ahorton's sales, seems he has the bases well covered! cheers.... Graham.P