DPReview.com is closing April 10th - Find out more

What's the easiest and most affordable way for obtaining UV reflectance images?

Started Apr 24, 2021 | Questions thread
petrochemist Veteran Member • Posts: 3,619
Re: Multispectral band extraction
1

ProfHankD wrote:

Yup, quartz lenses are the "right answer." That's why old EPROM chips used to be so expensive: to get enough UV to erase 'em, they needed a little quartz window and a ceramic package to mount it in. UV is also scary in that bright UV lights are a serious health hazzard, so compensating for poor response by boosting light levels is a really bad idea.

The price of photographic lenses designed for UV is at least 10 times what I feel I can justify. I've been wondering what the results might be like if I just use a single quartz element (available for around £20). Spherical aberration will probably be an issue, but the increased light transmission might allow an aperture to be small enough to compensate.

 petrochemist's gear list:petrochemist's gear list
Pentax K100D Sigma SD14 Pentax K-7 Panasonic Lumix DMC-GF2 Pentax Q +19 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow