Physics Lab Equipment

LEOI-98 Intermediate Spectrometer Goniometer

LEOI-98 Intermediate Spectrometer Goniometer

Features

  • Copper for main mechanical parts

  • High measurement accuracy

  • Detailed instruction manual

  • Easy operation


Introduction   



LEOI-98 Intermediate Spectrometer Goniometer is a precision optical instrument designed for intermediate-level spectroscopy and angular measurement experiments. It features a rotatable telescope and collimator, a graduated circular scale with vernier for accurate angle readings, and a stable mount for prisms or diffraction gratings. Ideal for physics and optics laboratories, the LEOI-98 allows users to analyze light spectra, measure refractive indices, and study diffraction and dispersion with reliable accuracy. It serves as a versatile tool for both teaching and experimental research in optical science.


Experimental examples include:

 

1. Measure prism angle based on reflection

2. Measure min-deviation angle of prism based on refraction

3. Calculate refractive index and dispersion of material

4. Measure wavelength of light or grating constant based on diffraction and interference

 

Using an optional Hydrogen lamp, atomic spectral lines of Hydrogen, such as the Balmer series, can be measured and the Rydberg constant can be calculated.

 



Specifications 


Angle measurement accuracy

1'
Optical parametersFocal length of objectives (collimation & telescope): 170 mm
Effective aperture: dia 22 mm
Field of view: 3°22′
Focal length of eyepiece: 24.3 mm
Max. distance between collimator & telescope120 mm
Slit width0.02 - 2 mm adjustable
Eyepiece compensation range± 5 diopters

Stage

Diameter: 70 mm

Rotating range: 360º
Vertical adjustment: 20 mm
Scale diskDiameter: 178 mm
Graduation: 0 - 360º
Division: 0.5º
Vernier reading: 1' (two symmetrical verniers)
Prism60º ± 5', ZF1 (nD=1.6475, nF-nC=0.09192)
Transformer6.3 V
Holographic grating300 l/mm


Part List


Description

Qty

Host  spectrometer

1

Prism

1

Optical parallel plate

1

Handheld magnifier w/illumination

1

Holographic grating

1

Transformer

1

Brush

1

Spare lamp

3

Screw driver

1

User's manual

1

Hydrogen-Deuterium lamp (for atomic spectrum experiment)

1 set (optional)


     LEOI-98-2.jpg

Detailed structure schematic

(click to enlarge)

       LEOI-98-3.jpg

Angle reading schematic


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