b
Fixing screws

How to adjust the lens (continued)

How to adjust the lens mounter for addressing

unevenness of focusing

„About the focus balance

zRelation between the orientation of the lens and focus surface on the screen side

If the projection lens is tilted in relation to the surface on which the images are formed, and the front (screen side) of the projection lens points downward (direction of broken arrow line) as shown in the example in the figure 1, the focus surface on the screen side is tilted so that its top is at the back of the screen and its bottom is in front of the screen.

Figure 1: Illustration of influence of lens orientation

Projection lens

Image formation surface

Focus surface on screen side

„Procedure for adjusting the focus balance (adjusting the tilt with the lens mounter)

There are focus adjustment screws in three places on the lens mounter of the projector that can be used as a correction function when evenness of the whole screen cannot be obtained even after adjusting the lens focus.

zStructure of lens mounter (Figure 2, Figure 3)

Turning the focus adjustment screws in three places on the lens mounter has the effect of moving the lens slightly forward or backward. Furthermore, tightening the fixing screws in three places locks the lens bracket to stop it from moving.

Figure 2 : Front view of lens mounter (when viewed from screen side)

Lens bracket a

c

(Adjust the focus adjustment screws a, b and c after installing the lens.)

Figure 3 : Cross-section view of lens mounter part

Lens tilt direction

Screen direction

(when adjustment screws

turned counterclockwise)

 

Lens bracket Adjustment Fixing screws

Lens

screw

 

Hole for Allen hex socket driver Spring

40 ENGLISH

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Panasonic PT-DW100E operating instructions „ About the focus balance, Illustration of influence of lens orientation