Author Archives: ElJefe

Originally published Oct 2016

I just posted a new whitepaper with a short primer on UV Fluorescence Photography and a diy 18W, 3-wavelength, professional-grade lamp.

The figure above shows pictures of Hackmanite from Bancroft, Ontario, Canada taken using this diy lamp: a) White light photograph; b) reflected near-UV with Baader-U and long-wave illumination; c) fluorescence with wideband (LW, MW and SW) excitation; d) long-wave UV excitation; e) fluorescence with mid-wave UV excitation; f) fluorescence with short-wave UV excitation.

The whitepaper is available at: Prutchi – DIY SW MW LW UV Lamp

Originally published Mar 6, 2018

I recently purchased a Seek RevealPro Thermal Camera, which boasts a 320 x 240 thermal sensor with >15 Hz frame rate at an incredibly affordable price.

One of the only issues that I have with this camera is that it comes with a fixed 32° field-of-view lens. This is OK for general thermal inspection, but it’s a real disadvantage when trying to use the camera for close-up work to assess dissipation on printed circuit boards, or for identifying a faulty or undersized component. On the opposite side of the distance range, the 32° FOV lens makes it difficult to see and measure the temperature of objects at a distance, or of smaller objects at normal distances.

I thus decided to build magnifying (“macro”) and close-up (“telephoto”) converters for the RevealPro. I’m passing along information on my designs in hopes that others will find it useful.  Detailed instructions in the following whitepaper: Diy-Thermal-Camera-Telephoto-Converter

My book “Exploring Ultraviolet Photography: Bee Vision, Forensic Imaging, and Other Near Ultraviolet Adventures with Your DSLR” is available on Amazon.

In this book, I will show you how to select equipment that allows you to capture otherworldly UV images. You’ll learn how to use filters that block visible light and prevent infrared light leaks and will discover how supplementing or overpowering sunlight with artificial UV light sources can help you create stronger images. You’ll also learn postprocessing techniques designed to enhance your UV photographs.

There is much to discover about the world as seen by bees, birds, and butterflies (and other creatures). I will take you into the wild to capture UV images that show how flowers advertise their nectar with beautiful markings to attract pollinating insects and birds. You’ll also discover how butterflies that look dull in visible light burst with intricate, iridescent patterns in UV.

Finally, you’ll learn about the scientific, medical, and forensic uses of ultraviolet photography.

From start to finish, this book will educate, inspire photographic creativity, and foster a better understanding of the UV world.

Welcome to UVIRimaging.com, a blog by David Prutchi, Ph.D. about imaging outside the visible range.

I’m the author of “Exploring Ultraviolet Photography: Bee Vision, Forensic Imaging, and Other Near-Ultraviolet Adventures with Your DSLR.”

The old site was messed up by my prior website hosting company, so posts prior to September 2023 are not available in their original form.

The most recent archival copy of the original website is available on the Wayback Machine at:

https://web.archive.org/web/20220122160247/http://uvirimaging.com/

Many of the posts were cross-published at my other sites: prutchi.com  or diyPhysics.com

My books are available at Amazon.com:

All opinions are my own.  They don’t necessarily reflect the opinions of my employer, affiliates, or associates.