Description
Specifications Table
Product Material – Optical-grade aluminum alloy with coated mirrors
Grade – Laboratory/Research Grade
Application – Wavelength measurement, refractive index studies, interference pattern analysis
Product Overview
The Michelson Interferometer (Complete with Diode Laser) is a precision optical instrument designed for creating and analyzing interference patterns with exceptional accuracy. Built with an optical-grade aluminum alloy frame, this interferometer ensures stability and minimal thermal expansion, critical for maintaining alignment during experiments. The included diode laser (typically 650nm wavelength) provides a coherent light source, enabling sharp, high-contrast fringe patterns essential for measuring wavelengths, refractive indices, and surface irregularities at micrometer scales. The beam splitter and adjustable mirrors are coated for maximum reflectivity and durability, reducing signal loss and enhancing measurement reliability. Unlike basic educational models, this interferometer features fine-adjustment screws with micrometer precision, allowing users to control path lengths with sub-micron resolution. The compact yet robust design makes it suitable for both benchtop research and advanced physics laboratories. Whether used for fundamental optics demonstrations or sophisticated material characterization, this system delivers consistent performance without requiring frequent recalibration. The laser’s low power consumption and long operational life ensure cost-effective, long-term use in demanding experimental setups.
FAQs
1. What wavelength does the included diode laser emit in this interferometer?
The standard diode laser in this Michelson interferometer emits at approximately 650nm, which falls in the red visible spectrum. This wavelength is ideal for creating clear interference fringes while remaining safe for regular lab use without specialized eye protection.
2. Can this interferometer be used to measure the refractive index of gases?
Yes, the Michelson interferometer is well-suited for refractive index measurements of gases by introducing a gas cell in one arm of the interferometer. The shift in fringe patterns corresponds to changes in optical path length, allowing precise calculation of the gas’s refractive index when compared to a vacuum or reference gas.
3. What alternatives exist if I need higher wavelength precision than a diode laser?
For applications requiring tighter wavelength control or narrower linewidths, helium-neon (He-Ne) lasers or frequency-stabilized diode lasers can be used as upgrades. These alternatives offer superior coherence lengths and spectral purity but may require additional power supplies or cooling systems.
4. How should I store the interferometer when not in use to prevent misalignment?
Store the interferometer in a dry, dust-free environment with the beam splitter and mirrors covered by protective caps if provided. Avoid exposing it to temperature fluctuations or vibrations, as these can disrupt the delicate optical alignments. For long-term storage, place it in its original packaging or a padded case.
5. Is this interferometer compatible with third-party optical components like polarizers?
The system is designed with standard SM1 threading (or equivalent) on the optical mounts, making it compatible with most commercial optical components, including polarizers, beam expanders, and filters. Ensure any added components match the laser’s wavelength and beam diameter for optimal performance.
