Princeton 4411-0139 ユーザーズマニュアル

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In prior chapters, the objective was to show how to take an image or spectrum with a 
minimal operating configuration and following a simple procedure. In this chapter, factors 
that affect more complex measurements are discussed.

Image intensified cameras such as the PI-MAX4 can be destroyed if 
exposed to excessive light levels. Princeton Instruments cannot take 
responsibility for damage due to misuse.

Intensified cameras must not be continuously exposed to high-level radiation (

 10

-4

 foot 

candles.) When the illumination level is not quantitatively known, toggle the 

 switch 

(located on the back of the PI-MAX4) to the OFF position while you are adjusting the 
incoming light level. After making adjustments, toggle the switch to the 

 position. If the 

alarm sounds repetitively, toggle the switch back to 

 and readjust the lighting 

conditions.
If the experimental conditions dictate that only a small portion of the photocathode is 
illuminated over relatively long periods of time, change the illuminated region of the 
photocathode periodically to avoid long term localized photocathode or MCP damage.
If you can do so, it is a good idea to avoid intense light on the intensifier even when it is off. 
High light levels increase EBI, often for hours, even when the intensifier is off. Image burn-
in can occur with some photocathode types.

The audible alarm and protection circuits are not fail-safe 
protection, particularly when working with high intensity 
sources such as lasers. For additional information, refer to 

, on page 121.