Ametek LAND LSP HD Series - 2.2 Changing the Focus Distance; Focus Adjustment Procedure and Table

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User Guide LSPHD Linescanner Head
2.2 Changing the focus distance
 (LSPHD 10,LSPHD 11,LSPHD 20,LSPHD 21&LSPHD 22 only)
The focus distance of the LSPHD 10, LSPHD 11, LSPHD 20, LSPHD 21 and LSPHD 22,
linescannerheadisfactorysetto2m/79in.Thefocusdistancecanbeuser-adjusted
intherange1m/40intoinnity.
1) Removethefrontcoverofthescanner(thepanelnearestthelaserswitch).
RefertoFig.2.ThefocuscanbeadjustedbyturningtheFocusing ring,which
isheldinplacebytheClamping plate.
2) RemovethetopscrewfromtheClamping plate to free the Focusing ring.
3) Inordertofocustheinstrumentaccurately,thefocusingmechanismmustrstbe
'zeroed'. Rotate the Focusing ringinthedirectionofthe'Focuslong'arrow(i.e.
totheright)untilitiswoundinfully.
4) Refertothetablebelow.RotatetheFocusing ring to the left for the number of
turnsrequiredtomatchthefocusdistanceyouwanttoset.
Thetablebelowgivesthefocusdistancesthatcanbeachievedbyturningthe
focusingring.Eachscrewholeonthefocusingringisat0.05ofaturn.
Focus distance
m / in
LSPHD 10
LSPHD 11
LSPHD 20 LSPHD 21
LSPHD 22
Numberofturnsfromfullywoundin
1.0/40 7.70 8.95 8.45
1.2/4.7 6.80 8.00 7.50
1.5/59 5.85 7.05 6.60
2.0/79 4.95 6.15 5.65
3.0/118 4.05 5.20 4.70
4.0/157 3.60 4.70 4.25
5.0/197 3.35 4.45 4.00
6.0/236 3.15 4.25 3.80
7.0/276 3.00 4.15 3.70
8.0/315 2.95 4.05 3.60
10.0/394 2.80 3.90 3.45
Innity 2.30 3.40 2.95
5) Toadjustthefocustoadistanceotherthanthatquotedintheabovetable,rotate
the focusing ring to the required intermediate position.
6) Whenyouhavefocusedthescannertotherequireddistance,therewillbeahole
in the Focusing ring thatalignswiththeholeintheClamping plate(youmay
needtoadjusttheFocusingringslightly).Insertandtightenthescrewthrough
the Clamping plate to secure the Focusing ring in position.
7) Replacethecoverpanel.
 Thescannerisnowfocused.