Features
High measurement accuracy
Stable and reliable experimental results
Suitable for both general & advanced physics labs
Affordable
Introduction
The LEOI-33C Apparatus of Ultrasonic Grating is designed to explore the ultrasonic induced photo-diffraction phenomenon, also known as the acousto-optic effect. This effect occurs when a sound wave interacts with light in a medium, resulting in the formation of an ultrasonic grating. The sound wave modulates the density of the medium, creating periodic variations in its refractive index. When a light beam passes through this medium, it is diffracted by these variations in refractive index, producing a diffraction pattern that can be used to measure the speed of sound in the medium.
The acousto-optic effect is critical in laser technology, optical signal processing, and integrated communication technology. It plays a vital role in devices like acousto-optic modulators and deflectors, which control the frequency, intensity, and direction of laser beams with high precision and speed.
The LEOI-33C apparatus is designed for hands-on experimentation, with all components mounted on an optical rail. The liquid medium used in the experiment allows for easy manipulation of the components, enhancing students' understanding and practical skills in optics. The apparatus delivers high measurement accuracy, stable results, and is well-suited for use in both general and advanced physics labs at universities and colleges.
By conducting experiments using this apparatus, students can achieve following objectives:
1. Understanding the Acousto-Optic Effect:
The system provides a clear demonstration of how sound waves modulate the refractive index of a medium, leading to the creation of an ultrasonic grating. Students will gain a deeper understanding of the fundamental principles of the acousto-optic effect.
2. Measurement of Sound Speed:
By using the acousto-optic effect, students can precisely measure the speed of sound in the liquid medium. The diffraction pattern produced by the ultrasonic grating can be analyzed to calculate the speed of sound with high accuracy.
3. Optical Path Alignment:
The system allows students to practice the alignment of optical paths, a crucial skill in experimental optics. They will adjust the position of individual components to achieve the correct alignment for the diffraction experiment.
The instruction manual contains experimental configurations, principles, step-by-step instructions, and examples of experiment results. Please click Experiment Theory and Contents to find more information about this apparatus.
Main Specifications
| Description | Specifications |
| Ultrasonic signal source | resonance frequency about 10.000 MHz, resolution 0.001 MHz |
| Slit | width 0.04 mm, length 6 mm |
| Lens | focal length 157 mm, effective aperture 28 mm |
| Ultrasonic cell | dimensions L 80 mm × W 40 mm × H 59 mm |
| Microscope eyepiece | measurement range 0 - 6 mm, resolution 0.01 mm |
| Optical rail | length 650 mm, scale 1 mm |
Parts List
| Description | Qty |
| Main electric unit | 1 |
| Low pressure sodium lamp | 1 |
| Optical rail | 1 |
| Slide | 5 |
| Narrow slit | 1 |
| Lens | 2 |
| Measurement eyepiece with mount | 1 |
| Ultrasonic cell | 1 |
| Support of ultrasonic cell | 1 |
| Cable | 2 |
| Power cord | 1 |
| Instruction manual | 1 |
