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Optics Education Kits

LEOK-1 Optics Experiments-Basic
LEOK-2 Holography & Interferometry
LEOK-3 Optics Experiments-Enhanced
LEOK-4 Geometrical Optics Kit
LEOK-5 Aberration & Fourier Optics
LEOK-6 Optics Experiments-Extended
LEOK-7 Laser Optical Demonstrator
LEOK-8 Interference/Diffraction-Basic
LEOK-9 Interference/Diffraction-Enhanced
LEOK-10 Holography Kit-Basic
LEOK-11 Holography Kit-Complete
LEOK-15 Diffraction Demonstrator
LEOK-20 Fiber Optics Kit-Basic
LEOK-21 Fiber Optics Kit-Complete
LEOK-22 Fiber Optics Kit-Enhanced
LEOK-23 Fiber Optics & Photonics Kit
LEOK-30 Newton's Ring-Complete
LEOK-31 Newton's Ring-Enhanced
LEOK-40 Modern Optics Experiments
LEOK-42 Fourier Optics Experiments
LEOK-43 Information Optics Kit
LEOK-44 Image Addition/Subtraction
LEOK-46 Image Differentiation
LEOK-48 Image Convolution
LEOK-50 Experiments with LC-SLM
LEOK-64 Room Light Holography
LEOK-70 Balmer Series of Hydrogen

Schematic diagram showing a lens and flat plate used to form Newton’s Rings

Schematic of a lens and a flat plate used to form Newton’s Rings


Newton's Ring Apparatus - Complete Model

Newton's Ring Experimental Apparatus
Including Sodium lamp with power supply
Including reading microscope for accurate measurement
Compact structure
Detailed instruction manual

The phenomenon of Newton's rings, named after Isaac Newton, is an interference pattern caused by the reflection of light between two surfaces - a spherical surface and an adjacent flat surface. When viewed with monochromatic light, it appears as a series of concentric, alternating light and dark rings centered at the point of contact between the two surfaces. Using this apparatus, students can observe the phenomenon of equal-thickness interference. By measuring interference fringe separation, the radius of curvature of the spherical surface can be calculated.


Minimum Division of Reading Drum

0.01 mm


20x, (1x, f = 38 mm for Objective; 20x, f = 16.6 mm for Eyepiece)

Working Distance

76 mm

View Field

10 mm

Measurement Range of Reticle

8 mm

Measurement Accuracy

0.01 mm

Sodium Lamp

15 ± 5 V AC, 20 W

Radius of Curvature of Newton's Ring

868.5 mm

Beam Splitter


Part List  



Sodium lamp (LLE-2)


Reading microscope


Newton's ring assembly (SZ-37B)


Beam splitter


Focusing knob


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