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.
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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 |
Hydrogen-Deuterium lamp (for atomic spectrum experiment) | 1 set (optional) |