Phosphors

 

Phosphor Decay Time

The anode screen of the image intensifier contains a layer of phosphorescent material. Upon impact of an electron, the phosphor screen will emit light. Depending on the type of phosphor, the intensity of the emitted light will decrease faster. The more efficient the phosphor, the slower its light intensity decays after excitation.

Our time-resolved cameras and camera attachments use P43 phosphor. The high luminous efficiency of this phosphor increases the light levels at the output of the image intensifier. This increases the quality of the resulting image.

Our high-speed cameras and camera attachments use P46 phosphor. This phosphor has a short decay time, so the light signal of consecutive frames doesn't get mixed up.

P47 phosphor is available on request, when even faster decay times are required.

 

Phosphor

P43
P46
P47

Emission

545 nm
530 nm
400 nm

Efficiency (e/kV)

20
6
4

Decay to 10%

1.5 ms
500 ns
100 ns

Decay to 1%

3 ms
2000 ns
400 ns