DIGITAL LASER DISTANCE METERS

LD05-A20 and LD05-A40
The RIEGL LD05 is a multi-purpose
laser distance meter based on precise
time-of-flight laser range measurement.
It uses state-of-the-art digital signal
processing enabling precise distancemeasurement for complex multi-target
situations even under bad visibility
conditions.
Digitizing
theechosignalandsubsequent analyzing allows multi-target
distance measurements. Five target
distances can be detected and provided
for each laser shot.

The LD05 can be configured for various application modes:•••High Penetration and High Accuracy Mode for complex target situations, based ona sequence of laser shots, self adapting (rather low) data update rateSignificant enhancement of the maximum range based on Pre-Detection-Averaging
Fast Mode is between the High Speed and High Penetration Mode, very high data
update rate
High Speed Mode for simple target situations, extremely high data update rate•••••

Short infrared laser pulses providing excellent interference
immunity
Narrow measurement beam with low divergence for excellent
spatial resolution
Measurement to almost any surface regardless of the angle ofincidence of the beam and the surface characteristics
Lightweight, stable aluminium housing, ready to be used in harshindustrial environments.
Different basic instrument types with pre-configured measurement
modes, but also individually programmable for customer
specific applications

visit our webpage
www.riegl.com

Technical Data LD05
Performance Examples
LD05-A20

LD05-A40

up to 500 m
up to 150 m
up to 2200 m

up to 900 m
up to 300 m
up to 2400 m

2m2m

typ. ± 12 mm

typ. ± 12 mm

typ. 100 Hz

typ. 100 Hz

55up to 250 mup to 80 m
up to 1200 m

up to 470 m
up to 160 m
up to 2200 m2m2m

typ. ± 15 mm

typ. ± 15 mm

2500 Hz2500 Hz

55up to 200 m
up to 60 m
up to 1000 m

up to 390 mup to 130 m
up to 1900 m2m2m

typ. ± 20 mm

typ. ± 20 mm

10000 Hz

10000 Hz

55

High Penetration andHigh Accuracy Mode1)

Measurement range
for natural targets, ρ ≥ 80%
for natural targets, ρ ≥ 10%2)reflector foil & plastic cat´s-eye reflector
Minimum range
Measurement accuracy
Measurement rate3) 4)

5)Max. number of targets

Fast Mode1)

Measurement range
for natural targets, ρ ≥ 80%
for natural targets, ρ ≥ 10%2)reflector foil & plastic cat´s-eye reflector
Minimum range
Measurement accuracy3) 4)

Measurement rate
Max. number of targets

High Speed Mode
1)

Measurement range
for natural targets, ρ ≥ 80%
for natural targets, ρ ≥ 10%2)reflector foil & plastic cat´s-eye reflector
Minimum range
Measurement accuracy
Measurement rate
Max. number of targets
1)

2)
3)
4)
5)

3) 4)

The following conditions are assumed• target is larger than footprint of laser beam, • perpendicular angle of incidence, • visibility 10 km• typical values for average ambient brightness conditions. In bright sunlight, the operational range is considerably
shorter than under an overcast sky. At dawn or at night the range is even higher.
Reflecting foil 3M DG4090 or equivalent, dimensions ≥ 0.45 x 0.45 m2 .
One sigma standard deviation @ 50 m range under RIEGL test conditions.
Plus distance depending error ≤ ± 20 ppm.
With self-adapting measurement time selected, the effective data update rate depends on the number of targets and theirreflectivity and distance.

www.riegl.com

Data Sheet, RIEGL LD05-A20/A40, 2016-08-30
page 2 of 7Technical Data LD05
Increasing Measurement Range
The measurement range can be increased by summing echo signals of multiple laser shots(pre-detection averaging) 1). The position of the target must be stable while a measurement isexecuted.
The following diagram shows the maximum measurement range versus pre-detection
averaging value without any atmospheric attenuation. Depending on atmospheric visibility,
the resulting maximum range can be further reduced.

The following diagram shows the measurement range values for the LD05-A40:1)

The following conditions are assumed• target is larger than footprint of laser beam, • perpendicular angle of incidence, • visibility 10 km• typical values for average ambient brightness conditions. In bright sunlight, the operational range is considerably
shorter than under an overcast sky. At dawn or at night the range is even higher.

www.riegl.com

Data Sheet, RIEGL LD05-A20/A40, 2016-08-30
page 3 of 7

Technical Data LD05

Optional Full WaveformMode
The digitized waveform data can be logged
to either an internal memory card or to a
TCP/IP data port. Subsequent offline fullwaveform
analysisallowsdetailed
investigation of the target situation,
especially with complex target situations.

Laser Specifications
Wavelength
Beam divergence1)

Laser product classificationaccording toIEC 60825-1:2007
The following clause applies for instruments
delivered into the United States:
Complies with 21 CFR 1040.10 and 1040.11
except for deviations pursuant toLaser Notice No. 50, dated June 24, 2007.

1)

LD05-A20

LD05-A40

near infrared

near infrared0.9 x 0.2 mrad

1.2 x 1.8 mrad

Laser Class 1M

Laser Class 1M

Viewing the laser output withcertain optical instruments
designed for use at a distance(for example telescopes andbinoculars) may pose an eye
hazard.

Viewing the laser output withcertain optical instruments
designed for use at adistance(for example telescopes andbinoculars) may pose an eye
hazard.

Measured at the 1/e2 points.1mrad corresponds to 10 cm beam width per 100 m distance.

www.riegl.com

Data Sheet, RIEGL LD05-A20/A40, 2016-08-30
page 4 of 7Technical Data LD05

General Technical Data
LD05-A20

LD05-A40

Data interfaces
Data port
Configuration port

TCP/IP, 10/100/1000 MBit port or RS232/RS422
TCP/IP, 10/100/1000 MBit port or RS232/RS422

WEB interface
Power supply

TCP/IP
11 – 28 V DC, 24 VDC nominal

Power consumption

18 W

Main dimensions (L x W x H) mm

230x133x84

259x133x84

Weightapprox. 2.1 kg

approx. 2.9 kg

IP64

IP64

Protection class
Temperature range
Operation
Storage-10°C up to +50°C1)-20°C up to +60°C

Mounting

Flanges on both sides

Optional
Analog Output

Switching Output

1)
2)
3)

1)

2)

4 – 20 mA , not galvanically isolated,
resolution 16 Bit, linearity 1 ‰ of full scale
3)

2 x PNP transistor driver ,built-in thermal and short-circuit protection,
switching current 200 mA max.,
switching voltage = supply voltage

The life expectancy (MTBF) of the instrument is reduced in case of operation and/or storage at high temperatures.
Operating range selectable via TCP/IP port or serial interface.
Switching points adjustable via TCP/IP port or serial interface.

www.riegl.com

Data Sheet, RIEGL LD05-A20/A40, 2016-08-30
page 5 of 7

Technical Data LD05

Dimensional Drawings LD05-A20
All dimensions in mm

www.riegl.com

Data Sheet, RIEGL LD05-A20/A40, 2016-08-30
page 6 of 7

Technical Data LD05

Dimensional Drawings LD05-A40
All dimensions in mm

Information contained herein is believed to be accurate and reliable. However, no responsibility is assumed by RIEGL LMS forits use. Technical data are subjected to change without notice.
Data Sheet, RIEGL LD05-A20/A40, 2016-08-30, page 7 of 7
RIEGL Laser Measurement Systems GmbH, 3580 Horn, Austria
Tel.: +43-2982-4211, Fax: +43-2982-4210, E-mail: office@riegl.co.at
RIEGL USA Inc., Orlando, Florida 32819, USA
Tel.: +1-407-248-9927, Fax: +1-407-248-2636, E-mail: info@rieglusa.com
RIEGL Japan Ltd., Tokyo 1640013, Japan
Tel.: +81-3-3382-7340, Fax: +81-3-3382-5843, E-mail: info@riegl-japan.co.jp
RIEGL China Ltd., Chaoyang District, Beijing, China
Tel.: +86 186 1819 868, E-mail: info@riegl.cn