Lambda SRS SR475 Manuale utente
Operation Manual
Laser Shutters
SR475 and SR476
Stanford Research Systems
Revision 1.2 •September 1, 2011
Distribution in the UK & Ireland
Lambda Photometrics Limited
Lambda House Batford Mill
Harpenden Herts AL5 5BZ
United Kingdom
W: www.lambdaphoto.co.uk
T: +44 (0)1582 764334
F: +44 (0)1582 712084
Certification
Stanford Research Systems certifies that this product met its published specifications at the time
of shipment.
Warranty
This Stanford Research Systems product is warranted against defects in materials and workman-
ship for a period of one (1) year from the date of shipment.
Service
For warranty service or repair, this product must be returned to a Stanford Research Systems
authorized service facility. Contact Stanford Research Systems or an authorized representative
before returning this product for repair.
Information in this document is subject to change without notice.
Copyright c
Stanford Research Systems, Inc., 2011. All rights reserved.
Stanford Research Systems, Inc.
1290–D Reamwood Avenue
Sunnyvale, CA 94089 USA
Phone: (408) 744-9040 •Fax: (408) 744-9049
Printed in U.S.A. Document number 9-01636-903
SR475 and SR476 Laser Shutters
Contents
General Information iii
Service .............................. iii
Environment ........................... iii
Laser Safety ........................... iii
Symbols ............................. iii
Notation ............................. iv
Specifications .......................... v
1 Operation 1 – 1
1.1 Introduction to the Instrument ............. 1–2
1.2 Mounting .......................... 1–6
1.3 Optical alignment ..................... 1–8
1.4 Optical power capacity .................. 1–9
1.5 Operating environment ................. 1–9
1.6 Alternate speed modes .................. 1–10
1.7 Shutter interface connector ................ 1–12
2 Remote Operation 2 – 1
2.1 Index of Commands ................... 2–2
2.2 Introduction ........................ 2–3
2.3 Commands ......................... 2–4
2.4 Command List ....................... 2–5
i
ii Contents
SR475 and SR476 Laser Shutters
General Information
The SR475 and SR476 Laser Shutters are high performance instru-
ments designed to provide fast, versatile, and reliable mechanical
blocking of a free-space laser beam while minimizing vibration and
acoustic noise.
Service
Do not install substitute parts or perform any unauthorized modi-
fications to this instrument. Contact the factory for instructions on
how to return the instrument for authorized service and adjustment.
Each SR475 and SR476 contains small parts and it is recommended
that users do not remove the covers, and in particular, the sealed inner
cover. There are no user-serviceable parts inside and reassembling
the unit to its calibrated state may be difficult or impossible.
Environment
This product is intended for use only in a clean and dry laboratory
environment. Operation in other environments may cause damage
to the product.
Laser Safety
Certain hazards are always present when working with laser radia-
tion. Visible and invisible beams of light have the potential to cause
serious bodily injury including blindness or death and to cause sig-
nificant damage to property.
While the SR475 and SR476 are designed for use with laser systems,
it is fully the users responsibility to ensure that safe operating
WARNING conditions are maintained and to provide for fail-safe operation
whenever an equipment failure could lead to a hazardous situation.
iii
iv General Information
Symbols you may Find on SRS Products
Symbol Description
Alternating current
Caution - risk of electric shock
Frame or chassis terminal
Caution - refer to accompanying documents
Earth (ground) terminal
Battery
Fuse
On (supply)
Off (supply)
SR475 and SR476 Laser Shutters
General Information v
Notation
The following notation will be used throughout this manual.
A warning means that injury or death is possible if the instructions
WARNING are not obeyed.
A caution means that damage to the instrument or other equipment
CAUTION is possible.
Typesetting conventions used in this manual are:
•Remote command names are set as A.
•Literal text other than command names is set as OFF.
Remote command examples will all be set in monospaced font. In
these examples, data sent by the host computer to the SR475 and
SR476 are set as straight teletype font, while responses received
by the host computer from the SR475 and SR476 are set as slanted
teletype font.
SR475 and SR476 Laser Shutters
vi General Information
Specifications
Operation
General
Primary function Block/unblock laser beam
Controller/Driver type SR470 Series
Clear aperture 0.120” (3 mm) min. (SR475)
0.040” (1 mm) min. (SR476)
Lifetime 107cycles min.
Shutter blade
Blade material BeCu alloy, black oxide finish
Optical power Low-power laser beams;
no absolute specification is established
Bearing type Sapphire jewel bearing
Blade position Servo controlled; neither open
nor closed is preferred
Power-offstate Blade position is indeterminate
Hold time Indefinite in either open or closed state.
Mounting
Orientation Any
Mounting holes 8-32 (3), 1/4-20 (1)
Housing material Anodized aluminum
Performance
Open/close time 5 ms full-stop to full-stop, in full-speed mode;
User selectable to 10 ms, 20 ms, or 40 ms (SR475)
4 ms full-stop to full-stop, in full-speed mode;
User selectable to 8 ms, 16 ms, or 32 ms (SR476)
Maximum rate 100 Hz (SR475)
125 Hz (SR476)
(Limited by open/close time).
Laser beam Determined by beam size/quality and shutter mode.
rise/fall time 500 μs typ., in full-speed mode (SR475)
750 μs typ., in full-speed mode (SR476)
Insertion delay jitter 10 μsrms typ.
(Measured at 10 Hz rep rate in full-speed mode.)
Bounce None allowed, at opening or closing
SR475 and SR476 Laser Shutters
General Information vii
Electrical and Mechanical
General
Interface SRS Shutter interface connector
Weight 0.28 lbs
Dimensions 2.25 W×1.6 H×1.0 D
Operating temperature 0 ◦Cto35◦C, non-condensing
Maximum temperature 90 ◦C
Shutter interface
Voltage inputs +12 VDC, +4.5 VDC
Current draw 1.20 A max. continuous (12 VDC)
0.25 A max. continuous (4.5 VDC)
Signal lines Serial TX, Serial RX, logic-level control
Connector type Mechanically compatible
with 6-pin IEEE-1394 cables.
Cable length 10 ft (3 m) max.
Cable shield Internally connected to housing
SR475 and SR476 Laser Shutters
viii General Information
SR475 and SR476 Laser Shutters
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