Re: Automotive HID Projector Lamp Exposing a PCB?
- From: "Tam/WB2TT" <t-tammaru@c0mca$t.net>
- Date: Wed, 19 Dec 2007 10:52:04 -0500
"D from BC" <myrealaddress@xxxxxxxxx> wrote in message
news:clhhm3p58l9170662upej1gcj8i8im06ko@xxxxxxxxxx
I expose pcbs with a cheapo 500W halogen work lamp.
Exposure time ~30 minutes..
Could I reduce the exp time with an auto HID projector lamp? (Scrap
yard. BMWs I think. Who hasn't been blinded by those suckers.)
I see blue light from those HID lamps.
If there's more blue end, than perhaps there's more UV too?
It's probably not a big spectral span from blue to the UV band.
A point light source is supposed to be best for exposing circuit
boards..
A projector makes a nice spot.
UV tubes radiate radially.
I have no idea how this difference in directionally has on the
exposure quality.
Anybody seen a spectral graph for those automotive HID lamps?
I tried to Google up a spectrum.. Nothing yet.
Note: UV tubes are not easily found around here but I'm surrounded by
scrap yards.. :)
D from BC
Philatelic supply houses sell UV lamps with a shade that sends most light
down. Some of them are even dual wavelength.
Tam
.
- References:
- Automotive HID Projector Lamp Exposing a PCB?
- From: D from BC
- Automotive HID Projector Lamp Exposing a PCB?
- Prev by Date: PIC 18F device has odd fade-in delay?
- Next by Date: Re: MS Project blues
- Previous by thread: Re: Automotive HID Projector Lamp Exposing a PCB?
- Next by thread: Re: Automotive HID Projector Lamp Exposing a PCB?
- Index(es):
Relevant Pages
|
