Vernier Laser Pointer Manual

Vernier Laser pointer Laser Pointer

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Laser Pointer

(Order Code LASER)

The Alpec Laser Pointer is a Class IIIa diode laser with a power of less than 5 mW.

The laser has a wavelength between 630 and 680 nm and is powered by two AAA

batteries which are included. A touch button can be found on the side of the pointer.

Press this button to turn the laser on.

Lasers and laser pointers have many uses in science courses:

 The Laser Pointer has many uses when combined with the Vernier Photogate. The

Vernier Photogate has two detectors. One detector, on the inside of the photogate,

allows you to use the photogate in a normal arrangement; e.g. measure the time

that the gate is blocked as an object passes through the photogate. The second

detector on the outside of the photogate can be used with a laser to produce a gate

that is wider than the normal 7.5 cm spacing. This wide photogate has many

applications. For example:

o You can set up a photogate wide enough to measure the speed of an

automobile or a person. You could even measure hand speed during a

karate chop.

o You can set up a photogate and the Laser Pointer close to the ground. A

person standing in the beam will block the gate. When he jumps vertically,

his hang time can be measured by the unblocking of the photogate.

o Using the arrangement described above, you could drop a ball into the laser

beam. As it bounces in the beam, you can use the blocking and unblocking

events to calculate the coefficient of restitution and dwell time.

o You can verify the shutter speed of a film camera by letting the beam pass

through the lens and out the back of the camera.

o You can measure the speed of a motor by determining the interruptions of a

beam caused by the light passing through spokes in a wheel.

 The Laser Pointer can be used with interference kits to observe interference

patterns. When used with a data collection interface and sensors, intensity patterns

can be recorded. A simple way to do this was described by Andrew DePino Jr. in

The Physics Teacher (“Diffraction Patterns Using a Constant Velocity Cart”, The

Physics Teacher, 40, 418-419 (October 2002). In the article, he describes how to

attach a Vernier Light Sensor to a constant velocity car. As the car moves

perpendicularly through the beam, the graph of light intensity vs. time

approximates a graph of light intensity vs. distance. To take the experiment one

step further, you can directly measure light intensity vs. distance data by

combining a Light Sensor with a Rotary Motion Sensor.

 Use the Laser Pointer to observe laser radiation. The radiation can be made

visible in air by clapping two chalkboard erasers in the beam to create a cloud of

reflecting particles.

Caution - As with any laser, caution must be exercised when using the laser pointer.

The Laser Pointer emits laser radiation, and therefore, should not be pointed at the

eye. Pay special attention to the location of the aperture, which is on the same end of

the pointer as the clip. A caution label can also be found on this end of the pointer.

Direct eye contact with the laser beam may cause serious injury. Students should be

reminded that this is not a toy, and it should be kept out of reach of children.

Battery Installation

To install the batteries, remove the end cap of the pointer (the end opposite the

aperture). Install the 2 AAA batteries with the positive (+) end of the batteries

pointing toward the open end of the case. After replacing the end cap, test the pointer

by pointing the aperture toward a wall and pressing the ON/OFF touch button on the

side of the pointer.

Accessories

A Laser Pointer Stand is available from Vernier Software & Technology (order code

STAND, $14). The stand provides a convenient way to mount the Laser Pointer. It

holds the laser in place and even holds the power button down for ease of use during

an experiment.

Vernier Software & Technology

13979 S.W. Millikan Way  Beaverton, OR 97005-2886

Toll Free (888) 837-6437 FAX (503) 277-2440  (503) 277-2299 

info@vernier.com  www.vernier.com

Rev.8/2/11

Printed on recycled paper.

Produkt Specifikationer

Mærke:	Vernier
Kategori:	Laser pointer
Model:	Laser Pointer
Produktfarve:	Sort
Indbygget skærm:	Ingen
Batterier inkluderet:	Ja
Batteritype:	AAA
Antal understøttede batterier:	2
Bølgelængde:	650 nm