DESCRIPTION

The LDS-1000 Laser Doppler Scale

(LDS) provides high speed, high accuracy

and long range positioning for single or

multiple axis applications, such as linear

motors, large gantry machines, CNC

machine tools, CMM's, precision stages,

Supermicrometers, and other linear

measurement devices. The LDS is

compact, easy to install, easy to align, has

less Abbe off-set, no cross coupling, and is

cost effective.

The LDS Series is compatible with all

mainstream controller feedback systems.

Versions are also available for operation

with an IBM PC compatible computer,

and the Laser head is insensitive to dirt,

oil, and hostile environments.

The LDS Laser Head reflects a modulated

laser beam off a movable target. The beam

is detected and processed for displacement

information used by your system

controller to determine position.

Installation is made easy with only three

components; the laser head, the

retroreflector, and the processor

module, that produces either

AQuadB Square Waves or

Up/Down Pulses. The

LDS-1000 directly replaces

glass scales and other

positioning devices in your

existing systems, and optional

cards include RS-232, and

Sinusoidal outputs.

System Components

L-109 Laser Head: HeNe laser head,

ruggedized for direct installation in a

machine tool and other positioning

application. Contains a HeNe tube, optics

and a photodetector receiver and outputs to

P-311 Processor Module.

L-109HP Laser Head: High Performance

laser head with higher stability and

accuracy. A solid mounting base and a

linear DC power supply are used.

L-201 Laser Head: Wide beam and long

range laser head with 12 mm output laser

beam diameter.

P-311 Processor Module: This is a tower

type box, contains the electronics for signal

processing and generation of the A Quad B

square waves or Up/Down Pulses. Many

options can also be added to the Processor

module. A TTL level error is standard. An

optional error signal/warning signal with

latching relay is also available.

P-108HP Processor Module: This

Processor Module with a linear dc power

supply P-107HP is for the high performance

laser scale LDS-1000HP.

R-102A Retroreflector: 1/2" diameter

retroreflector without post or base. Used to

return the laser beam back to the Laser

Head receiving aperture on a path parallel

to the input beam, regardless of the angle

of incidence. Movement of the

retroreflector determines displacement

measurement.

LD-21R Cable Set: Connects the Laser

Head to the P311 Processor Module.

LDS Series Model LDS-1000 Laser Doppler scale LASER SCALE FOR POSITIONING APPLICATIONS Precision Linear Positioning

FEATURES

High accuracy and high

resolution.

No need for periodic calibration.

No wearing parts for non-contact

devices.

Freedom to locate point of

measurement close to measured

object reduces Abbe Error.

Orthogonality of positioning

system determined by mirrors

not X-Y stages when using a flat

mirror target.

Electronics flexibility with

variable increment.

No mounting stress on scale.

No thermal expansion on scale.

No need for machined flat

surface for mounting scale

saving installation costs.

Higher loop gain possible for

closed loop servo control.

Optional hermetic seals for

hostile environments.

Rejection of vibration in two or

three planes reduces structural

resonance effects.

OPTIONS AND ACCESSORIES

ICB Counter Board: The Counter

Board when installed, resides on the P-311

Processor Module, and converts the signal

information to BCD output for use with

the D-101 10 Digit LED Display. This

board must be present when a D-101

Display is used. The board also provides

the RS-232 Full Duplex function for the

system. Parameters including

displacement are available from the RS232

port.

D-101 10 Digit LED Display: Provides

information on positioning without the

need for a computer or a controller.

Connects to the P-311 Processor and

allows readings from the system to be

viewed easily from distances. Inches or

mm format. Requires ICB Counter Board

to be installed in the P-311 Processor

Module.

IHS Reference Mark for Home

Positioning: An electro-optical device

used to determine home position. A knife

edge connected to the carriage is passed

through an IR light beam, and a TTL

output pulse is sent to your controller to

set the desired function. Position

repeatability is better than 1 μm.

IPC3 Selectable Increment Board: For

some applications when a specific

increment or resolution is required by a

specified model of controller, an IPC3

board can be used to meet this

requirement. Allows you to set the

AQuadB or Up/Down pulses to any

increment you choose (with IPD2 from

3.11 μinand up, with IPD1 from 0.39 μin

and up) from 24.9 μin and up.

IPD2 Divide by 8 Board: Increases

resolution to 3.11 microinches. Generates

8 additional output pulses for each pulse

received from the laser at the standard

resolution of 24.914155 microinches per

pulse, changing the resolution to 3.11

microinches per pulse. Maximum velocity

is 24 ips. Maximum error is ± 1 least

count.

IPDl Divide by 64 Board: Increases

resolution to 0.39 microinches. Generates

64 additional output pulses for each pulse

received from the laser at the standard

resolution of 24.914155 microinches per

pulse. Maximum velocity is 3.2 ips and

maximum pulse rate is 10 MHz.

Maximum error is ± 1 least count.

ER-400 Extended Range: Extends the

range of the laser system to 400 inches.

ER-2000 Extended Range: Extends the

range of the laser system to 2,000 inches.

LD57PL Laser Head Gun Barrel:

Laser Head Gun Barrel Attachment - 3"

tube that attaches to the front of the laser

head to provide protection against oil and

flying debris.

LD57PR Retroreflector Gun Barrel:

Retroreflector Gun Barrel Attachment - 3"

tube that attaches to the front of the

retroreflector to provide protection against

oil and flying debris.

LD51S 90 degree beam bender: Fixed

90 degree mirror that attaches to front of

Laser Head.

LHSI Hermetically Sealed: Sealed

Laser Head with the exception of the

connectors.

IPPS Sinusoidal Output: Board that

provides a sine wave output as required by

some controllers such as Fanuc, Siemens,

etc. The quadrature sine/cosine wave

signals are approximately 1 v peak to peak

at 56 Ohm termination. The period of the

sine wave is 40.513167 micrometer or 64

times the wavelength. Controllers can

interpolate up to 2048 times to obtain high

resolution. The maximum frequency is 100

kHz.

IPPSH Single Wavelength Sinusoidal

Output: Board that provides a sine wave

output signal with a period of one

wavelength. Controllers can interpolate up

to 2048 times to obtain a resolution of 0.31

nm.

IEWR Relay for Warning and Error :

This relay can be used for the Error

Signal, Warning Signal, or both. Two of

these relays can be used, one for each

function. The relay is triggered by the

Error Signal/ Warning Signal and is

latched for 200 msec. The relay is open

when there is an error condition, and it is

closed 200 msec after the error condition

is removed. The rise time is 5 msec. The

maximum contact Voltage is 60V, and the

maximum current is 0.5A.

SYSTEMS CONFIGURATION

There are three basic LDS-1000 systems

available, the LDS-1000, LDS-1000WB and

LDS-1000HP. The LDS-1000 is the basic

system, the LDS-1000WB is for long range with

12 mm laser output beam diameter, and the LDS-

1000HP is for higher stability and accuracy

applications. The basic system configuration for

LDS-1000 are the followings.

L-109 Laser Head

R-102A 0.5” diameter retroreflector

P-311 Processor Module

LD-21R Cable set

ER-2000 Extended Range to 2000

in for L-109

LHS1 Hermetically Sealed

(Except Connectors)

LD-57PL Laser Head Gun-barrel

LD-57PR Retroreflector

Gun-barrel

IPPS Sinusoidal Output (64

wavelength) IPPSH High Resolution Sinusoidal

Output (1 wavelength)

Available Options are the followings.

IHS Home Position Transducer

IPC3 Pulse Convertor

IPC4 Automatic ATC Converter

Board & C4 Board(w/probes)

IPPD2 Wavelength Divided by 8

Board

IPD1 Wavelength Divided by 64

Board

IPP32 32-bit Parallel Board

(IPCAX)

ICB Counter Board with

Microprocessor

D-101 10 Digit LED Display

ER-400 Extended Range to 400 in

for L-109

P-311 Processor Module

LASER HEAD (L-109)

0.25 7.50

8.00

0.25

3.00

LASER HEAD (L-102)

0.28

2.90 2.30

1.50 7.00

2.02

.375

MOUNTING HOLES FOR #1/4-20 SCREW OR #10-24X2” SOKET HEAD SCREW 4PLACES AT BOTH ENDS

2.02

1.297

.20

8.50

8.00

HOLE FOR #8-32 SCREW 2 PLACES

FIG.2.2b STANDARD LASER HEAD (L-109,L-102)

Optodyne, Inc.

1180 Mahalo Place, Rancho Dominguez, CA 90220

Tel: 310-635-7481 Toll-Free: 800-766-3920 Fax: 310-635-6301 Web-Site: http://www.optodyne.com

e-mail: sales@optodyne.com

SPECIFICATIONS: L-109 Laser Head:

Power: 0.5 mw HeNe

Class: 11 21 CFR 1040.10, 1040.11

Alignment Tolerance: lateral ±0.05

inches

Wavelength: 632.8 nm

Weight: 2 lb.

Warm-up Time: 20 minutes

Resolution/Slew Rate:

IPSI Processor Card:

25 microinches (0.6 µm), slew 200 ips

IPD2 Divide by 8 Board:

3.1 microinches (0.078 µm), slew 24

ips

IPD1 Divide by 64 Board:

0.38 microinches (0.009 µm), slew 3.2

ips

Output:

Up/Down Pulses

AQuadB Square Waves

(Differential Output available)

Stability: 0.1 ppm

Accuracy: 1 ppm (typical)

Maximum Range:

L-109 Laser Head: 40 inches

With -ER-400 Option 400 inches

With -ER-2000 Option 2,000 inches

Maximum Speed:

< 200 ips (5 m/s) with IPS 1 Processor Card

Maximum Acceleration:

Laser Head 8g

Retroreflector 100,000g

IHS Home Position Signal

Output: TTL Square Wave

Termination: 120 Ohms

Rise Time: 15 nsec

Pulse Width: 5 msec

Repeatability: < lμm

Operating

Environment:

Temperature 60 to 90° F

Altitude 0 to 10,000 ft

Humidity 0 to 95% non-condensing

Dimensions System Components:

L-109 Laser head: 2 x 2 x 8.5 inches

(50.8 x 50.8 x 215.9 mm)

L-201 Laser Head: 2 x 4 x 9.5 inches

(50.8 x 50.8 x 215.9 mm)

L-109 HP Laser Head: 2.1 x 2.4 x 9.5

inches (53.3 x 61 x 241.3 mm)

R-102 Retroreflector: ؽ inch (12.7

mm)

R-106 Retroreflector: Ø1 inch (25.4

mm)

P-311 Processor Module: 4 x 6 x 11.5

inches (101.6 x a52.4 x 292.1 mm)

Application Support

Engineering support is provided by

Optodyne's qualified team of

engineering professionals to assure that

your application receives full benefit

from the Laser System.

0.098

0.60

0.10

0.60 0.75

0.80

R-102A Retroreflector

L-109 Laser Head