How to align lightlever optics

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Presentation transcript:

How to align lightlever optics Mirror bracket Clamp screw Access hole LightLever Pickoff tube mounted above prism box

Pickoff tube pieces pickoff tube lens lens slider wrench mirror bracket

To inspect optics, first loosen clamp screw with 3/32” hex key

Remove pickoff tube Be careful not to touch pellicle against edge of hole

Inspect pellicle Film should be flat and smooth Remove dirt with puff of air Do not touch film with fingers or brush

Remove mirror bracket with 0.035” hex key (0.9 mm)

Use wrench to remove slider Twist and pull

Inspect lens for dirt

Reassemble pickoff tube Be careful tube is not twisted in mount

Place pickoff back into hole Be careful not to touch pellicle against edge of hole

Align mirror bracket straight up/down and tighten clamp screw

Remove mirror bracket

so bare tube is sticking out

Turn on trap laser and adjust control rods so that trap focus is in middle of TV screen

Place IR indicator card 9” away from end of tube Wear laser goggles to protect your eyes

Beam should focus to a point 9”distant and 5” above the table Fake spot shown Real spot not so bright

Move lens slider in/out with wrench to adjust 9” focal distance

Loosen clamp screw and pull pickoff tube in/out to adjust 5” focal height but do not rotate tube which changes twist of pellicle

Beam spot moves Up/Down when pickoff tube slides In/Out Make spot 5” above table slide tube in/out

Tighten clamp screw and replace mirror bracket

Place IR detector card inside instrument head Spot should be visible near position detector Fake spot shown here Real spot not so bright

If spot is not visible try twisting position of mirror bracket until you see spot on card

Adjust LightLever mirror screws with 5/64” (2mm) hex wrench

so as to put beam inside PSD target

Move beam up/down and right/left using control rods

Problem : Strange triangle pattern in LL window Problem : Strange triangle pattern in LL window. Solution: Be sure spot passes through middle of TV screen and adjust light-lever mirror screws to center spot on PSD target

Now spot is centered on detector so pattern moves up/down and right/left with control rods

If pattern is tilted more than 10 degrees try twisting pellicle relative to mirror

The End