PASCO OS-9477 User Manual

Instruction Sheet
for the PASCO
Model OS-9477

012-04755C

POLARIZING SHEETS

Introduction

The PASCO Polarizing Sheets are synthetic linear
polarizing filters that possess special properties for
selectively absorbing light vibrations in certain planes.
When unpolarized light which is a complex mixture of
vibrations lying in all possible directions transverse to
the line of travel is passed through a linear polarizer,
its vibrations become confined to a single linear plane
and the light is considered "polarized" (See Figure 1).
This linearly polarized light can be modified to sup­press unwanted reflections and to eliminate glare for a
variety of applications.

These neutral linear polarizers represent the best
balance between transmission and extinction for
general use. Extinction transmission is approximately
.005%. Typical applications include variable density
filter systems, photoelastic stress analysis and other
applications where light modulation is necessary. By
using two polarizing sheets, experiments with parallel
and crossed transmittance can be performed (see
Figure 2).

Unpolarized

Light

Linear

Polarizer

Figure 1

Transmitting

Dimensions: 9.50" x 8.00" x .030"

Axis

Absorbing

Axis

012-04755C

®

2

10

1

10

0

10

-1

10

-2

10

PERCENT TRANSMITTANCE

-3

10

400 475 550 625 700 775 850

Single: Transmittance for a single film.
Parallel: Transmittance for a double film, axes parallel.
Crossed: Transmittance for a double film, axes crossed.

SINGLE

PARALLEL

CROSSED

WAVELENGTH, NM.

Figure 2

Limited Warranty

PASCO scientific warrants this product to be free from
defects in materials and workmanship for a period of
one year from the date of shipment to the customer.
PASCO will repair or replace, at its option, any part of
the product which is deemed to be defective in material
or workmanship. This warranty does not cover damage
to the product caused by abuse or improper use.
Determination of whether a product failure is the result
of a manufacturing defect or improper use by the
customer shall be made solely by PASCO scientific.
Responsibility for the return of equipment for warranty
repair belongs to the customer. Equipment must be
properly packed to prevent damage and shipped
postage or freight prepaid. (Damage caused by im­proper packing of the equipment for return shipment
will not be covered by the warranty.) Shipping costs
for returning the equipment, after repair, will be paid
by PASCO scientific.

2