Thoriated Glass Plano-convex Lens from a Vintage Kodak Projector in Display Case
Size: 29 mm in diameter and about 6mm thick
Weight: 12.3 Grams
Display case size: 51x51x20mm
Display case and separate 3D display window (used in 1st picture) included.
Please watch the video to see that there are no scratches or chips on the face of this lens.
Thoriated glass is a specialized material used in optical systems, specifically photographic lenses, to significantly increase their refractive index. Because it incorporates thorium dioxide, the glass is naturally radioactive and can contain up to 30% thorium by weight. Over time, this radiation exposure causes the glass to develop a characteristic brown tint that reduces light transmission and interferes with neutral color reproduction. Fortunately, this discoloration is not permanent and can be successfully reversed by exposing the lens to ultraviolet (UV) light.
Th-232 is an optimal choice for calibrating Radiacode devices, as it offers the three calibration points required to calibrate at energy levels of 65, 583, and 2614 keV. We provide a procedure for Radiacode calibration using thoriated glass on our Blog.
Devices and coin are not included.
NOTE: By purchasing this item, you agree that you have read our Terms and Conditions (which also serves as our Warnings and Notices).
