I just posted a whitepaper containing complete construction details for two DIY imagers for the shortwave ultraviolet band. These UV converters can be used for RUVIS and Solar-Blind imaging applications. The blog post is at: http://uvirimaging.com/2016/07/03/diy-shortwave-uv-image-converters-for-solar-blind-and-ruvis-imaging/ and the whitepaper (a clean version of the post with high-res pictures) at: http://uvirimaging.com/wp-content/uploads/2016/07/Prutchi-diy-Shortwave-UV-Converters-and-cameras.pdf For more diy UV photography
Reader Paul Wallace contacted me to tell me about the DOLPi electro-optic polarization camera that he built for his iPhone. His ingenious solution makes use of the iPhone’s flashlight to calibrate and synchronize the control of the polarization analyzer (hacked from a welder’s mask as described in the DOLPi whitepaper).
My new book “Exploring Ultraviolet Photography: Bee Vision, Forensic Imaging, and Other Near Ultraviolet Adventures with Your DSLR” is now available on Amazon for pre-order. 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
Andrew Gliesman sent me these pictures of his DOLPi Visor replication along with a very kind note. …I wanted to thank you for your excellent paper on the DOLPi Polarimetric Camera. The amount of technical detail combined with providing a solution of a real world humanitarian problem made it special to me. I recently built
Hackaday published an excellent article by Al Williams titled “The Grid Dip Meter: Forgotten Instrument”. This reminded me of an interesting physics experiment that really helped me back in college to understand the mechanism behind nuclear resonance. The experiment was described as a note in the American Journal of Physics in 1963: R.J. Blume,
Shanni presented on “Construction of an Entangled Photon Source for Experimenting with Quantum Technologies” at the 2015 Hackaday SuperConference. Her lecture has been uploaded by Hackaday and is available now available online. CLICK HERE for the link to the HaD Blog and Video.
The DOLPi Raspberry Pi-based polarimetric cameras received 5th place in the 2015 Hackaday Prize. Winners for this year’s prizes were announced on stage at the Hackaday Superconference on November 14, 2015. The DOLPi project involved the development and construction of two low-cost polarimetric camera types based on the Raspberry Pi 2. DOLPi-MECH (and its productized IR-VIS-UV
The final version of the DOLPi whitepaper is now available here: DOLPi_Polarimetric_Camera_D_Prutchi_2015_v5
Hack-a-Day just announced the finalists for the 2015 Prize, and DOLPi is one of them! Hack-a-Day Prize 2015 Finalists for the announcement. Here is the list of Finalists: DOLPi – RasPi Polarization Camera FarmBot – CNC Farming and Gardening Eye Controlled Wheelchair! Gas Sensor For Emergency Workers Household Electrically Enhanced Wet Scrubber Luka EV Portable
Although the circuit of shown so far as the liquid crystal panel’s AC driver works well, I’m not too happy with the intrinsic non-linearity of the FET. Because of this, today I designed and tested an alternative, a bit more complex, but I believe more elegant design. In the circuit shown above, the LCP
A new version of the DOLPi polarimetric camera whitepaper has been released at: DOLPi_Polarimetric_Camera_D_Prutchi_2015_v4
The new version of the whitepaper is available at: DOLPi_Polarimetric_Camera_D_Prutchi_2015_v3
A new, complete version of the whitepaper on DOLPi is available for download here: DOLPi_Polarimetric_Camera_D_Prutchi_2015_v2 This paper presents the development and construction of two low-cost polarimetric cameras based on the Raspberry Pi 2. “DOLPi-MECH” is a filter-wheel-type camera capable of performing full Stokes analysis, while the electro-optic based “DOLPi” camera performs full linear polarimetric analysis
The image that the liquid-crystal-panel-based DOLPi takes at “45 degrees” is not strictly that, which is why I state in the paper: “Bossa Nova’s method is straightforward if laboratory optical-grade components are used. These are very expensive and out of reach for most private enthusiasts. However, I found through experimentation that a welding mask LCP