Constant Deviation Spectrograph Manufacturer,Supplier and Exporter in India

Constant Deviation Spectrograph (Product Code: SLE/M/39) is a prism spectroscopic instrument used to observe, measure and record spectral lines in advanced physics laboratories. Its Broca-type prism is turned by an external wavelength drum, so the collimator and telescope stay fixed while each wavelength is brought into view. It is built by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India, as part of its physics lab equipment in India.

Specifications

What Is the Constant Deviation Spectrograph Used For?

In an ordinary spectrometer the telescope swings round to follow each colour. In a constant deviation instrument the collimator and telescope are fixed at one angle and the prism rotates instead; turning the wavelength drum brings successive lines onto the cross-wire so that wavelengths can be read directly. Physics departments looking for a prism spectrometer in India choose this design for M.Sc. work on line spectra of sodium, mercury and other discharge lamps.

The optional parts extend the experiments. A Fabry-Perot etalon or Lummer-Gehrcke (L.G.) plate on the extension mount reveals the fine structure of a line, the Edser-Butler plate measures wavelength from channelled spectra, the filar micrometer eyepiece measures small line separations to 0.001 cm, and the camera with plate holder records a spectrum. With the monochromator attachment the instrument can also deliver light of a selected wavelength.

What to Specify When Ordering

• Prism: glass E.D.F. or D.E.D.F.
• Telescope attachments: monochromator attachment, filar micrometer eyepiece, camera and plate holder
• Fabry-Perot etalon separation: 3 mm, 5 mm or 10 mm
• Other accessories: accessory bar, Edser-Butler plate, L.G. plate with stand, condenser on stand
• Number of instruments

OEM Manufacturer

ScienceLab is the trading name of Jain Scientific Equipments Private Limited, the OEM (original equipment manufacturer) of this Constant Deviation Spectrograph. It is produced at the company's own licensed factory in the HSIIDC Industrial Area at Saha, Ambala, Haryana, India, where the complete instrument is made and assembled rather than bought in from another supplier.

Buying from the maker means the configuration you order — prism, etalon separation and attachments — is quoted and supplied factory-direct to universities, research institutes, dealers and importers in India and international markets. Additional accessories or replacement parts for instruments already in your laboratory can be requested from the manufacturer; ask us. See the ScienceLab profile.

Related Laboratory Equipment

Sources and optics apparatus used in spectroscopy practicals:

• Sodium Spectral Lamp — a common line source for calibration and fine-structure work
• Spectral Lamp Power Supply with Lamp Holder — powers the spectral lamp
• Spectrometer — for introductory prism and grating experiments
• Michelson Interferometer — for interference-based wavelength measurement

The instrument is listed in our Microscope category; further optics apparatus is in Physics Lab Equipment.

Frequently Asked Questions

How does the Constant Deviation Spectrograph work?
The Constant Deviation Spectrograph keeps its collimator and telescope fixed and rotates a Broca-type prism with an outside wavelength drum. Each wavelength in turn is deviated through the same angle into the telescope, so spectral lines are brought to the cross-wire and read from the drum.

Which prisms are used in the Constant Deviation Spectrograph?
The Constant Deviation Spectrograph has a Broca-type prism of refractive index 1.65/1.74 housed under a cover on the prism table. Glass prisms in E.D.F. and D.E.D.F. grades are also listed, so state which you require when you ask for a quotation.

What telescope attachments are available?
The Constant Deviation Spectrograph offers extra telescope attachments: a conversion attachment that turns it into a monochromator, a filar micrometer eyepiece reading 0.001 cm, a camera with plate holder, and a separate plate holder for the camera.

What Fabry-Perot etalon can be supplied with the spectrograph?
The Fabry-Perot etalon offered with the Constant Deviation Spectrograph has a 30 mm aperture and an etalon separation of 3 mm, 5 mm or 10 mm, as desired by the customer. It fits the extension mount, which also takes an L.G. plate or Edser-Butler plate.

Who manufactures the Constant Deviation Spectrograph?
The Constant Deviation Spectrograph is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory at Saha, Ambala, Haryana, India. Quotations, accessory orders and replacement-part requests are handled directly by the manufacturer.

Is a light source included with the Constant Deviation Spectrograph?
A lamp is not among the listed parts of the Constant Deviation Spectrograph, although a condenser on stand is included in the general accessories. Laboratories usually add a spectral lamp and power supply; include them in your enquiry if you need a complete set-up.

Request a Quote

Your quotation for the Constant Deviation Spectrograph comes direct from the manufacturer. List the prism, etalon separation and attachments you need on our contact page, or add the instrument to the enquiry cart.

Last updated: 24 September 2026