CONSTANT DEVIATION SPECTRMETER CDS manufacturer in india

a.Collimating Tube:

O.D.50mm 1.0. : 44mm for fining collimating lens

Telescope Tube44mm for fitting telescope lens.

It is provided with rack & pinion arrangement for proper focusing of spectral lines.

Eyepiece; (Ramsden Type) : magnification : 10x

 In eyepiece holder a conical pointer is fined in the focal plane of eyepiece.

b.Corrected achromatic doublet are fitted in the lens holders of collimator and telescope tube.

Doublet dia : 44mm, F.1. : 350mm (14").

The Collimator and telescope tubes are fitted in cast iron blocks which are mounted on a machined cast iron blocks which in turn are mounted on a machined cast iron plate.

c.Suitable gap is provided between collimating lens and prism table to accommodate high resolving instrument like Fabry-Perot Etalon.

d.Prism Table is fitted on the machined cast iron plate and actuated by tangent screw to provide smooth rotation of the C.D.S. prism placed on it.

e.Prism table is covered with a box of a aluminum casting having two gates. One gate allows light coming from collimator to enter into C.D.S. Prism

Another gate allows light to be collected by telescopic objective after light being dispersed from

C.D.S. prism.

f.A calibrated drum (Calibration for visible region i.e. from 4000A?- 7000A°) is attached with the prism table assembly. Accuracy of calibration ± 5A?

h.Machined cast iron plate with drum assembly is fitted over the head of a heavy cast iron base. The base and machined cast iron plate are painted in a staple Grey colour.

Collimator, Telescope, Prism table, Drum assembly are painted black.

Accessories (Light Source):

• Mercury Vapour Lamp Assembly

• MercuryVapour Lamp 80 Watts

• MercuryVapour Lamp Box

• Mercury Vapour lamp Transformer 80 Watts