[rescue] VRE01/VT1200 pictures
james at foonly.com
Wed Jul 10 11:22:43 CDT 2002
On Wed, 10 Jul 2002, Leslie Connally wrote:
> I never understood what the fuss was about with blue LED.. It just wasnt
> something I had any interest in. But I travel liquidation surplus circles,
> and several years ago, a buddy was _OH SO_ excited. he had bought .. i
> dunno 50,000 LEDs new surplus.. and I dont remember 10-20% turned out to be
> blue ones..
> He was very very OH SO excited..
I'm not surprised. Even just a few years ago blue LEDs were nearly 2
orders of magnitude more expensive than comparable red or green ones.
5000 of them are worth a nice chunk of change if you can hook up a buyer.
I just remember it being an unattainable color for a long time. We had R
and G aplenty, but no B (and therefore no arbitrary colored solid state
light sources). When they first came out they were visually striking even
through they were dim.
Similar example: cheap vanadate DPSS crystals pumped with laser diodes
finally allowed (relatively) cheap compact low-maint lasers smack in the
middle of the visual range. Quite striking, even in the milliwatt range.
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