Physics Lab Equipment

LEOI-98 Intermediate Spectrometer Goniometer

LEOI-98 Intermediate Spectrometer Goniometer

Introduction   


This intermediate spectrometer goniometer is used for spectral and angle measurements to verify optical reflection, refraction, diffraction, interference and polarization principles.

 

Experimental examples are:

 

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.

 

Using a set of optional polarizer, analyzer and quarter-wave plate, a variety of optical polarization experiments can be conducted, such as polarization by reflection and measurement of Brewster’s angle, verification of Malus’s law, generation of circularly and elliptically polarized light, and demonstration of ellipsometry.



Specifications 

Angle measurement accuracy

1'
Optical parameters Focal 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 & telescope 120 mm
Slit width 0.02 - 2 mm adjustable
Eyepiece compensation range ± 5 diopters

Stage

Diameter: 70 mm

Rotating range: 360º
Vertical adjustment: 20 mm
Scale disk Diameter: 178 mm
Graduation: 0 - 360º
Division: 0.5º
Vernier reading: 1' (two symmetrical verniers)
Prism 60º ± 5', ZF1 (nD=1.6475, nF-nC=0.09192)
Transformer 6.3 V
Holographic grating 300 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

Polarizer, analyzer and quarter wave plate (for polarization experiments)

1 set (optional)

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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