L-8003-2438
Data sheet
RLD 90° detector head
For the fiber optic laser encoder
Renishaw’s RLE fiber optic laser encoder uses interferometry
to provide high resolution, high linearity position feedback.
The RLE comprises of the RLU laser unit and a range of RLD
detector heads. This data sheet describes the 90° RLD
detector head.
The detector head is the core of the optical measuring system
containing the interferometer, reference optics, fringe detector,
laser shutter and beam steerer.
To complete the interferometer configuration, only one
additional optic is required in either plane mirror or
retroreflector based configurations. For easy installation, the
integral rotary beam steerer allows final adjustments to be
made to optimise the beam alignment after the head has
been secured.
The head dissipates negligible power and is designed to be
thermally stable.
Two versions of the RLD 90° head are available, one for use
in a plane mirror interferometer (PMI) and one for use with a
retroreflector interferometer (RRI). The fiber optic cable can
be disconnected from the detector unit and the electrical cable
can be disconnected from the laser head, thus allowing each
to be pulled through small cable tracks and ducting. The
detector head incorporates a safety interlock that cuts power
to the laser if either the fiber or electrical cable are
disconnected.
Legislative – Laser safety:
CE and FCC
The RLD 90°detector head is supplied from a 633nm class II laser
source emitting <1 mW. It incorporates a laser beam shutter and laser
beam on indicator, thus conforming to the relevant sections of
EN60825-1and EN60825-2
The fiber optic coupling in the head has an interlock, so if the fiber or
electrical cable is withdrawn, power to the laser tube is disconnected.
Labelling
Aperture identification warning label with the wording, “Avoid exposure
laser radiation emitted from aperture”. A Class II laser product
identification label is also applied to conform to both EN60825-1 and
21CFR1040 legislation.
CAUTION
LASER RADIATION - DO
NOT STARE INTO BEAM
MAXIMUM OUTPUT 1mW
CONTINUOUS, 632.8 nm
CLASS II LASER
PRODUCT
50 (1.97)
27
(1.06)
13.5
(0.53)
Cable
Fiber
coupling
Laser beam indicator
4 off fixing screws
98 (3.86)
Laser beam shutter
38±0.2 (1.5±0.008)
38±0.2 (1.5±0.008)
Return beam
Output beam
19 (0.75)
13.5
(0.53)
31.5 (1.24)
7 (0.28)
General outline and dimensions
Dimensions in mm (inches)
Overall dimensions of the laser head:
Height: 31.5 (1.24)
Length: 98 (3.86)
Width: 50 (1.97)
Fixing:
4 off M3 x 0.5 x 35 mm or
5-40-UNC x 13/8cap head screws
on a 38 mm square pitch.
The RLD 90°detector head can be mounted on
either top or bottom faces providing 90°or 270°
laser output from the same unit.
RLD 90°detector head operating parameters
Axis travel PMI 0-1m
RRI 0 -4m
Linearity PMI <±5 nm
RRI <±10 nm
Accuracy (uncompensated) 0.02% Accounts for environmental effects including altitude up
to 1500 m and a cosine error up to 1mm/100mm
Zero point drift 100 nm/°C Measured by mounting mirror and detector close together
on a zerodur base and changing the temperature
Beam diameter 3mm
Beam separation 7mm Center to center
Beam alignment adjustment ±1°pitch Integrated beam steering to simplify beam alignment
±2°yaw
Beam alignment tolerance 50 arcseconds Tolerance applies to both pitch and yaw during operation
for plane mirror
Cable length (standard) 3m Permanent attachment to the detector head and 15 pin D
type connector at the laser
Cable diameter 6.5mm Terminated with a 15 way D type connector
Fiber diameter (armoured) 5 mm Removable from the interferometer head (connector 12mm Dia.)
Cable and fiber bend radii 25mm static
Cable and fiber bend radii 50mm dynamic
Component weight 0.25Kg
Renishaw plc
Old Town, Wotton-under-Edge,
Gloucestershire GL12 7DW
United Kingdom
T+44 (0) 1453 844302
F+44 (0) 1453 844236
Elaser.products@renishaw.com
www.renishaw.com
Laser beam alignment:
The RLD 90°detector head incorporates a beam steerer to simplify the alignment
process on installation. Prior to installation, ensure that the alignment groves are
horizontal and that both locking screws are loose, as shown in Figure 1. Align the
head on the 4 mounting screws by securing one of the two nearest the aperture
and rotate (yaw) the detector head until the maximum signal strength is achieved.
To then increase the signal strength to its optimum, rotate the beam steerer using
the key, as shown in Figure 1 to adjust the pitch. Finally, tighten the locking screw
on the top side and 4 fixing screws.
RLD identification and ordering
The RLD is normally supplied with the
appropriate RLU laser unit as a configured
RLE10 fiber optic laser encoder system.
For full details of available RLE10 system
configurations consult a Renishaw
representative. For special applications or
spares requirements the RLD is available
separately, the generic form RLD detector
head part number is shown below:
Fixing screws
Locking screws
Figure 1
Key
© 2001 Renishaw Printed in England 1101 (V3) Part No. L-8003-2438
Part
Number
Type
Angle
Optics
Cable length
Beam
Dia
Series
RLD 10 A3 P9
For details of available RLD options consult a Renishaw
representative .
Renishaw reserves the right to change specifications without
notice.
Australia
Renishaw Oceania Pty Ltd,
Melbourne
T+61 3 9521 0922
F+61 3 9521 0932
Eaustralia@renishaw.com
Brazil
Renishaw Latino Americana Ltda,
São Paulo
T+55 11 4195 2866
F+55 11 4195 1641
Ebrazil@renishaw.com
The People’s Republic
of China
Renishaw Representative Office,
Beijing
T+86 10 6410 7993
F+86 10 6410 7992
Echina@renishaw.com
Renishaw Representative Office,
Shanghai
T+86 21 6353 4897/5697
F+86 21 6353 4881
Echina@renishaw.com
France
Renishaw S.A., Marne la Vallée
T+33 1 64 61 84 84
F+33 1 64 61 65 26
Efrance@renishaw.com
Germany
Renishaw GmbH, Pliezhausen
T+49 7127 9810
F+49 7127 88237
Egermany@renishaw.com
Hong Kong
Renishaw (Hong Kong) Ltd,
Kowloon Bay
T+852 2753 0638
F+852 2756 8786
Ehongkong@renishaw.com
India
Renishaw Metrology
Systems Pvt Ltd, Bangalore
T+91 80 5320 144
F+91 80 5320 140
Eindia@renishaw.com
Indonesia
Renishaw Representative Office,
Jakarta
T+62 21 428 70153
F+62 21 424 3934
Eindonesia@renishaw.com
Italy
Renishaw S.p.A., Torino
T+39 011 966 10 52
F+39 011 966 40 83
Eitaly@renishaw.com
Japan
Renishaw K.K., Tokyo
T+81 3 5332 6021
F+81 3 5332 6025
Ejapan@renishaw.com
Renishaw K.K., Nagoya
T+81 52 733 1321
F+81 52 733 7705
Ejapan@renishaw.com
The Netherlands
Renishaw International B.V.,
Prinsenbeek
T+31 76 543 11 00
F+31 76 543 11 09
Ebenelux@renishaw.com
Singapore
Renishaw Representative Office
T+65 897 5466
F+65 897 5467
Esingapore@renishaw.com
Slovenia
RLS merilna tehnika d.o.o.
Ljubljana
T+386 1 52 72 100
F+386 1 52 72 129
Email@ris.si
South Korea
Renishaw Liaison Office, Seoul
T+82 2 565 6878
F+82 2 565 6879
Esouthkorea@renishaw.com
Spain
Renishaw Iberica S.A., Barcelona
T+34 93 478 21 31
F+34 93 478 16 08
Espain@renishaw.com
Switzerland
Renishaw A.G., Pfäffikon
T+41 55 415 50 60
F+41 55 415 50 69
Eswitzerland@renishaw.com
Taiwan
Renishaw Representative Office
Taichung City
T+886 4 251 3665
F+886 4 251 3621
Etaiwan@renishaw.com
UK (Head Office)
Renishaw plc, Gloucestershire
T+44 1453 524524
F+44 1453 524901
Euk@renishaw.com
USA
Renishaw Inc.,
Hoffman Estates, IL
T+1 847 286 9953
F+1 847 286 9974
Eusa@renishaw.com
For all other countries
T+44 1453 524524
F+44 1453 524901
Einternational@renishaw.com
Renishaw offices worldwide
