3B Scientific Laser Reflection Sensor - Manual (Page 3)

3B SCIENTIFIC® PHYSICS
1
Laser Reflection Sensor U8533380
Instruction sheet
11/07 TLE
1 Connecting cable, miniDIN
2 Push-button for distant zone
3 Light transmitter and light
receiver
4 Push-button for near zone
1. Safety instructions
The laser reflection sensor meets the safety regula-
tions for Class 2 lasers. It emits light in the visible
region of the spectrum (400 – 700 nm). The radia-
tion power is less than 1 mW.
Provided that the instrument is used in accordance
with the instructions, safe operation is ensured.
In schools and other places of education or train-
ing, the instrument must only be used under the
supervision of a trained and responsible person.
Do not look into the light beam - that is not
necessary when using the sensor.
• If the housing of the instrument shows visible
signs of damage, it must be taken out of use
immediately.
• Do not use any optical equipment that narrows
the light beam.
• Do not open the instrument housing.
2. Description
The instrument emits a laser beam at 630 nm
wavelength and measures the reflected light. Two
sensitivity ranges (near zone and distant zone) are
provided, to adjust the instrument parameters for
different operating conditions.
The near-zone setting (4) adjusts the instrument
parameters for operating distances of 5 to 50 mm.
The experiment should be chosen so that there are
widely different reflectivities (e.g. matt black mark-
ings on a white or diffusely reflecting background).
With reflecting foils or microprism mirrors, a larger
fraction of the light is reflected in the incident
direction, and one can then work with a beam box
up to 5 m long without special adjustments to the
mirror. In such cases one should use the distant-
zone setting (2).
By connecting the instrument to other external
technical aids, one can measure physical quantities
related to the motions of bodies, such as rate of