PASCO OS-8470 Manual de usuario

Instruction Sheet

012-09517C

Basic Optics Light Source

OS-8470

800-772-8700 www.pasco.com

Introduction

The OS-8470 Basic Optics Light Source is suitable for a vari-

ety of experiments and demonstrations. You can place it in

three different orientations on a tabletop or mount it on a

PASCO Basic Optics Bench or Dynamics Optics Carriage. It

functions as a bright point source, an illuminated

crossed-arrow object, a primary-color source, and a ray box

with up to five parallel rays.

Equipment Setup

Power

Connect the included universal AC adapter to the light

source’s power port. Plug the adapter into a power outlet (100

to 240 VAC).

Optics Bench or Carriage Mounting

To mount the light source on a Basic Optics Bench, place it

vertically on the bench and press down; the outer tabs of the

light source snap into the side slots of the bench. (Attach the

light source to a Dynamics Optics Carriage in the same way.)

Marks on the tabs indicate the horizontal positions of the point

Included Equipment Part Number

Basic Optics Light Source OS-8470

Universal AC Adapter 540-072

Spare Bulb (stored under access cover) 526-044

Press down

Tabs

Release lever

Model No. OS-8470 Equipment Setup

source and object screen. To detach the light source, squeeze

the release lever and pull up.

Tabletop Placement

The light source can be placed on a tabletop in three ways:

vertically, horizontally, and flat, as illustrated below.

Tabletop placement

Point Source

The halogen bulb’s filament viewed “end on” closely approxi-

mates a true point source. It projects light through the round

opening in the case, but its actual location is about 3 cm

behind the outer surface of the case, as indicated by marks on

the tabs.

To use the point source, mount the unit on an optics bench or

carriage (see above), or place it vertically or horizontally on a

tabletop.

Illuminated Object

The object is a backlit, translucent screen with crossed arrows

printed on it. The pattern is asymmetrical so you can tell if

images formed with lenses and mirror are reversed or

inverted. Millimeter scales on both arrows allow you to mea-

sure the magnification of an image even if the entire image is

not visible.

To use the illuminated object, mount the light source on an

optics bench or carriage (see above), or place it vertically or

horizontally on a tabletop.

Ray Box

Ray wheel in 5-ray position

To use the light source as a ray box, place the unit flat on a

table top. Turn the wheel to select one, three, or five parallel

rays projected onto the table. A sheet of white paper placed

flat on the table makes the rays easier to see and allows you to

trace them with a pencil.

Use prisms, mirrors, and cylindrical lenses (such as those

included in the OS-8516A Ray Optics Kit) to study how the

rays are refracted and reflected.

Vertical

Horizontal

Flat

Point source

Position mark

on tab

Turn to select

number of rays

Model No. OS-8470 Bulb Replacement

Primary Colors

Place the light source flat on a sheet of white paper and turn

the wheel so that the colored bars are in the lowest position.

Red, green, and blue parallel beams are projected onto the

paper or a vertical surface placed in front of the light source.

Use a prism or convergent cylindrical lens to combine all three

colors. Block one of the beams with a pencil to see the combi-

nation of two colors.

Bulb Replacement

The light source includes a spare bulb, which is stored under

the access cover. Use a #0 Phillips screwdriver to unfasten the

screws securing the access cover and remove the cover.

Remove the old bulb by pulling it straight out. Install the new

bulb by pushing it straight into the socket. Align it approxi-

mately with the round opening in the case; then proceed to the

alignment instructions below.

Caution: If the burned-out bulb has been in use recently, it may

be hot. Allow it to cool before removing it.

Important: Handle the replacement bulb with clean tissue paper and

avoid touching it. Oils transferred from your skin to the bulb may cause

the glass to overheat and break. If the new bulb has been touched,

clean it with alcohol before installing it.

Bulb Alignment

To produce parallel rays, the filament of the bulb must be

located on the imaginary line running through the center of the

round opening and the center of the crossed-arrow object

screen.

To check the alignment, with the light source un-powered,

look into the unit through the round opening. Viewed end-on,

the filament looks like a small loop. Sight through the filament

to the center of the crossed-arrow object (viewed from the

back). If the filament does not appear in the center of the

round opening, then it is out of alignment. It is helpful to tape

a pair of crossed threads over the opening to mark its center.

View into round opening showing the properly aligned filament

To adjust the alignment, use a Phillips screwdriver to turn the

screws on the light bulb socket. To move the filament up or

down (as you are looking down through the access hatch) turn

both screws equally in the same direction. To move the fila-

ment side-to-side, turn the screws by the same amount in

opposite directions.

View into access hatch

Spare bulb

Access cover

Back of object screen

Filament

Alignment screws

Model No. OS-8470 Specifications

Specifications

Troubleshooting

Technical Support

For assistance with any PASCO product, contact PASCO at:

Limited Warranty

For a description of the product warranty, see the PASCO catalog.

The PASCO scientific 012-09517C Basic Optics Light Source Instruction

non-profit educational institutions for reproduction of any part of this man-

ual, providing the reproductions are used only in their laboratories and

classrooms, and are not sold for profit. Reproduction under any other cir-

cumstances, without the written consent of PASCO scientific, is prohibited.

Trademarks

PASCO and PASCO scientific are trademarks or registered trademarks of

PASCO scientific, in the United States and/or in other countries. All other

brands, products, or service names are or may be trademarks or service

marks of, and are used to identify, products or services of, their respective

owners. For more information visit www.pasco.com/legal.

Bulb type G4 halogen, 12 V, 10 W

Input Power (to

included AC Adapter)

100 to 240 VAC, 50 to 60 Hz

Dimensions 16 cm × 10 cm × 9 cm

Problem Solution

Bulb does not

illuminate when the AC

adapter is connected.

Ensure that the AC adapter is plugged

into an operating power outlet.

Replace bulb with included spare.

Test the output of the adapter; it should

be 12 VDC.

Rays are not parallel or

do not appear as thin,

straight lines of light.

Check and adjust bulb alignment.

Address: PASCO scientific

10101 Foothills Blvd.

Roseville, CA 95747-7100

Phone: 916-462-8384 (worldwide)

877-373-0300 (U.S.)

Web: www.pasco.com

Email: [email protected]

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