Photek are accustomed to processing a wide range of photocathodes. The transfer technique gives exceptional uniformity and low background noise. The graph below gives an outline of typical characteristics expected from photocathodes applied to our two most common substrates, fibre optic, and Fused silica.Photek does have the ability to tailor a photocathode to suit the desired frequency or sensitivity of the customer. For more details on this, and to discuss specific needs please contact us.
Background Noise
The background noise is dominated by the choice of photocathode, and is not usually affected by the number of MCP's or gain. Typical specifications are:
| Cathode Dark | Dark Noise |
| S20 | >200 cps/cm2 |
| Low Noise S20 | 30 - 50 cps/cm2 |
| Bialkali | 5 - 20 cps/cm2 |
| Solar Blind | < 5 cps/cm2 |
