Vintage Thoriated Glass Camera Lens


Vintage Thoriated Glass Camera Lens Assembly

Availability: 2 in stock

Shipped with USPS First Class

This listing is for one vintage camera lens assembly that was removed from a pre-1970s Kodak camera. The lens assembly is guaranteed to contain at least one thoriated glass lens.

Each thoriated glass lens may contain up to 30% thorium by weight.

Not all vintage Kodak lenses use thoriated glass.

Although the model number and other optical characteristics are considered proprietary information, this lens should produce a count above 300 CPM with a beta/gamma sensitive GM Tube as shown in the pictures.

The lens should produce a count above 6000 CPM with a pancake tube.

If the lens has developed a brown tint over time, the discoloration can be mitigated by exposing the lens to ultraviolet light.

More About thoriated glass from Wikipedia:

Thoriated glass is a glass material used in the manufacture of optical systems, specifically photographic lenses. It is useful for this process due to its high refractive index. Thoriated glass is radioactive due to the inclusion of thorium dioxide, the oxide of the radioactive element thorium. It has therefore been succeeded as a material of choice for the glass including lanthanum oxide. Thoriated glass can contain up to 30% by weight of thorium. The thoriated glass elements in lenses over time develop a brown tint reducing transmission and interfering with neutral color reproduction.

This listing meets the requirements of NRC 10 CFR 40.22

It also meets U.S.P.S domestic shipping requirements for exempt limited quantities of class 7 materials according to –347.22 “are eligible under 49 CFR to be shipped as excepted packages for limited quantities” and –Exhibit 347.22 Activity Limits– and also –173.435– Table of A1 and A2 values

Geiger counter is not included