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測試卡說明

YE0148測試圖設計用於

•相機鏡頭調整

•檢查後焦距 

借助低透射濾光片和低水平的照明確保相機不超多打開的孔調製位置。

A）光學對焦：調整最大焦距變焦鏡頭的焦距。

B）後焦距（鏡頭）：透過調整鏡頭機械螺絲調整鏡頭的聚焦距離在最短和A）之間交替最佳化。

C）後焦距（拾取管）：如果焦點以為通道不同最大和最小間距之間有所差異，那麼要透過個別拾取管的機械調整光軸。 

1、選擇白色通道。設定光聚焦在最大焦距和發散焦點，調整W-聲道拾取管直到達到最佳焦距。如果最佳化需要可用光學焦點調整替代。

2.以不變的光學焦點和焦距最短的紅色和藍色拾取管調節，直到達到最佳聚焦。影像對焦（對焦調整）是透過調整後焦距已得到全焦段（放大的）和恆定的距離物件。

The YE0148 test chart is designed for

•adjustment of camera lenses

•checking back focal distance

With the aid of a low transmission filter and by means of low level lighting make sure that the camera is not over modulated with the aperture in the open position.

a)Optical focus: Adjust focus of zoom lens at greatest focal length.

b)Back focal distance (lens): Adjust focus at shortest focal length by regulating lens mechanically with adjustment screw and optimize alternatively with a).

c)Back focal distance (pick-up tubes): If focus varies from channel between greatest and shortest focal length, the individual pick-up tubes must be adjusted mechanicallyin the optical axis.

1.Select white channel. Set optical focus at greatest focal length and divergent focus adjust the pick-up tube in W-channel until optimum focus is achieved. If necessary optimize by alternative with optical foecessary optimize by alternative with optical foecessary.

2.With un變focal distance adjustment. 

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