Which layer of the CR imaging plate prevents unwanted light from reaching the latent image?

• A. Conductor layer
• B. Light shield layer
• C. Support layer
• D. Color layer

Answer: (B)

The main idea is that the latent image must be protected from any ambient light so it isn’t erased or fogged before readout. The light shield layer sits in the plate’s stack to block stray light from reaching the phosphor layer where the latent image sits. By absorbing or blocking external light, it keeps the stored signal intact until the plate is purposely scanned with the laser. Other layers have different jobs—conductive layers dissipate static electricity to prevent artifacts, the support layer provides physical structure, and the color layer isn’t involved in preventing light from reaching the latent image.