Atomfair-PLI-739 Precision Laser Interferometer
Product Overview
Atomfair-PLI-739 is a high-performance precision laser interferometer dedicated to experimental research related to interference, diffraction, and polarization. It supports flexible execution of three classic interference experiments: Michelson Interference, Fabry-Perot Interference, and Twyman-Green Interference. Featuring an exquisite integrated design, all structural components are securely mounted on a heavy-duty and stable platform. This not only significantly reduces experimental setup time and enhances efficiency but also effectively resists the interference of vibrations on the experimental process, ensuring accurate and reliable results. The seamless switching between the three interference modes, combined with rich experimental content and simple operation, makes it an excellent choice for conducting combined interference experiments.
Key Experimental Capabilities
1. Michelson Interference Mode
- Obtain interference fringes; observe equal-inclination interference fringes, equal-thickness interference fringes, and white light interference fringes (requires optional accessories)
- Measure the wavelength of He-Ne laser and sodium light
- Determine the wavelength difference of sodium yellow doublet
- Measure air refractive index (requires optional accessories)
- Determine the refractive index of transparent media
2. Fabry-Perot Interference Mode
- Observe multi-beam interference phenomena
- Measure the wavelength of He-Ne laser
- Observe the interference of sodium doublet
3. Twyman-Green Interference Mode
- Observe Twyman-Green interference phenomena
Standard Configuration & Technical Specifications
| Configuration Name | Detailed Specifications |
|---|---|
| Precision Interferometer Main Unit | Flatness of beam splitter and compensation plate: better than 1/10λ; Minimum division of micrometer screw corresponding to movable mirror stroke: 0.00025mm; Movable mirror stroke: 0.625mm; Fabry-Perot mirror: reflectivity 90%, transmittance 1%, diameter 30mm |
| Laser & Bracket | He-Ne laser, wavelength 632.8nm, including matching power supply |
| Ground Glass Screen | Diameter: 60mm |
| Adjustment Frame | Including beam expander frame, extension frame, and film holder |
| Other Accessories | Dual-purpose observation screen, transparent thin sheets |
Note: The above configurations and parameters are for reference only. Please refer to the product packing list for the actual configuration. Minor changes will not be notified separately.
Optional Accessories
| Optional Accessory Name | Specification Parameters |
|---|---|
| Sodium-Tungsten Dual Lamp | Sodium lamp power: 20W; Tungsten bromide lamp specification: 12V 35W, adjustable brightness |
| Air Chamber | Length: 80mm, suitable for air refractive index measurement |
Application Scenarios
Ideal for educational institutions, research laboratories, and industrial R&D departments engaged in optical physics research, laser technology development, and precision measurement. It can be widely used in experiments and projects such as optical interference principle verification, wavelength measurement, refractive index testing, and optical component performance detection, providing reliable experimental support for scientific research and technical innovation.
If you’re interested, have any questions, or have specific customization requirements, please feel free to contact us at inquiry@atomfair.com.
How does the flatness specification of the beam splitter and compensation plate (better than 1/10λ) affect the interference fringe quality in the Michelson mode?
The flatness better than 1/10λ ensures minimal wavefront distortion, enabling high-contrast fringes. This specification is critical for observing equal-inclination, equal-thickness, and white light interference fringes with minimal aberration.
What is the maximum displacement range of the movable mirror and what is the minimum resolvable displacement?
The movable mirror stroke is 0.625 mm, and the micrometer screw has a minimum division corresponding to 0.00025 mm mirror displacement. This allows precise adjustment for fine fringe scanning and wavelength measurement.
Can the PLI-739 switch between Michelson, Fabry-Perot, and Twyman-Green interference modes without additional optical components?
Yes, the integrated design allows seamless switching between the three modes using the standard configuration. No additional optical components are needed for mode switching, though optional accessories (e.g., air chamber) expand measurement capabilities.
The Atomfair-PLI-739 integrates Michelson, Fabry-Perot, and Twyman-Green interferometry on a single heavy-duty platform, enabling wavelength, refractive index, and optical flatness measurements with a 0.00025 mm micrometer resolution and a 0.625 mm movable mirror stroke. Its beam splitter flatness better than 1/10λ supports reliable fringe observation, though the 0.625 mm stroke limits path-length difference range and the 90% reflectivity Fabry-Perot mirrors constrain finesse for high-resolution spectroscopy.
Positive
- Triple-mode interferometry on one platform: Seamless switching between Michelson, Fabry-Perot, and Twyman-Green modes on a single heavy-duty base reduces setup time and supports combined interference experiments without reconfiguration.
- High-resolution micrometer drive: The movable mirror's 0.00025 mm minimum division enables precise optical path difference adjustments, essential for accurate wavelength and refractive index measurements.
Trade-offs
- Limited mirror stroke: The 0.625 mm movable mirror stroke restricts the maximum optical path difference, which may limit coherence-length-dependent measurements and high-resolution spectroscopy applications.
- Fabry-Perot finesse constrained by mirror reflectivity: With 90% reflectivity and 1% transmittance, the Fabry-Perot mirrors provide moderate finesse, which may not be sufficient for ultra-high-resolution spectral analysis.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
