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INTERMEDIATE SPECTROMETER
This instrument is designed for high per-
formance student use. It has a cast alu-
minum alloy main structure. The collima-
tor tube is mounted on the fixed pillar
and telescope tube on the moveable part.
Both the collimator and telescope have
175mm focal length, 32mm clear aperture object glass at
their one ends. The collimator has a precision slit 6mm
high and telescope has Ramsden eye-piece 15X at their
other ends. Both collimator and telescope have rack and
pinion focusing and means for leveling their axes and
squaring them to the axis of rotation.The scale is 127mm
diameter with a protective shield that is fixed to the
telescope movement and the prism table is attached to
the double ended vernier which reads to 1 minute arc.
Both telescope and table can be rotated independently
by hand about the same vertical axis. These can be
clamped at the desired positions and adjusted precisely
with the help of fine adjustment screws. Prism table is
marked with lines to assist placing the prism with
respect to the table leveling screws and has screwed
holes for fixing prism and grating holders. Prism holder
can accommodate prisms up to 38mm high. Supplied with
prism holder, grating holder, magnifier glass, tommy bar
for adjustment of optical axis and dense flint glass
prism, equilateral 32x32mm. In wood case. New/Unused
I1476D $325.00
HANDHELD DIRECT VISION SPECTROSCOPE
A real beauty! Great for demonstrating spectra from
any visible light source. Precision made heavy duty
stainless steel construction with an Amici type 3-ele-
ment prism assembly, variable optical slit and
adjustable eyepiece. Easy to use: Optical slit adjusts
by rotating the knurled end piece, and focus is slip
type. Contrast and resolution of the spectrum is
changed by adjusting the slit opening. Both emission and absorption spectra
can be viewed. 4 inches long by 1 inch diameter on the slit end. New with
wood case. Edmund has a similar spectroscope for $272.00
I1479D $49.00
Instruments - Page 59
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