How Interferometers Work & How We Save You Time & Money
Excedr’s leasing program can source all instrument types and accommodate any brand preferences you might have. Request an interferometer lease estimate today and see how leasing can discount your interferometry instrument’s price.
All equipment brands/models are available
The Advantages of Excedr’s Interferometer Leasing Program:
- Eliminates the upfront cost of purchasing equipment by spreading its cost over time
- Minimizes equipment downtime with included complete repair coverage and preventive maintenance
- Takes advantage of potentially 100% tax deductible* payments, providing you significant cash-savings
- Expedites the administrative work needed for instrument procurement and logistics
- Conserves working capital, enabling you to reinvest in your core business and operations (staffing, inventory, marketing/sales, etc.)
- Accommodates all manufacturer and model preferences
*Please consult your tax advisor to determine the full tax implications of leasing equipment.
An interferometer is a type of optical instrument used in surface metrology to determine surface topography, height variation, and characterization analysis, as well as thin-film thickness.
It provides this data using interferometry, a method of precision measurement that relies on superimposing beams of light, or wavelenghts, to generate an interference pattern, which can be used to extract information regarding microscopic displacements, refractive index changes, and surface irregularities.
Interferometry is used in several fields, including optical metrology, engineering metrology, spectroscopy, astronomy, oceanography, seismology, optometry/ophthalmology, and much more.
Professionals from various industries all over the world use this method to provide measurement information about differences in optical path lengths using wavelengths. These measurements can be used in production of optical components and assemblies used in the construction of complete optical systems.
Interferometers, which use interferometry to generate data, can be found in a wide array of verticals, from the semiconductor and consumer electronics industries to aerospace and defense, and are critical to the success of production where 3D non-contact measurement solutions are required.
Laser interferometers are one of the most common types of interferometers used in metrology, employing HeNe (helium-neon) lasers that offer high performance and stability, are small size, and provide high-quality optical output. Laser-based interferometry has seen great success when used in metrology and inspection due to laser light being more regular and precise than ordinary light.
Furthermore, it can produce coherent beams, where all the light waves present travel in phase. Traveling in phase means two signals with the same frequency are in exact alignment at the same time, and is quite significant when optical surface measurements are being performed.
Besides interferometers that use laser beams, there are several other types available. One example includes the white light interferometer, which is used for high-resolution step height and roughness measurements over a large field of view (FoV) using Michelson and Mirau functions.
A Michelson interferometer produces interference fringes by splitting a beam of light so that one beam strikes a mirror fixed in place while the other strikes a movable mirror, combining afterwards to produce an interference pattern.
Despite being invented by Albert Michelson in 1887, it is one of the typical configurations for optical interferometry, even today. The Mirau interferometer works on the same basic principles as the Michelson interferometer. That said, the reference arm of the Mirau is in a different location, located within a microscope objective assembly, or an object lens.
Let’s review interferometer types, techniques, and applications used throughout metrology labs and shop floors.
How Interference Works, Laser Interferometer Types, & More
These instruments come in various shapes and sizes, can be used to measure things at the microscopic level to large astronomical occurrences, and are capable of a wide range of applications. But, no matter what, all have one thing in common: they generate interference patterns.
To better understand how interferometers work, it helps to know more about interference. We’ll review the principles of interference, and go over various type of interferometers, from phase shifting, Michelson, and Mirau to Tyman-Green and Fizeau laser interferometers.
Basic Principles of Interference
Laser Interferometry & Calibration System Leases to Fit Every Need
Interferometers are critical in numerous manufacturing industries—especially the automotive industry—because of their ability to make precise measurements using non-contact methods, as well as their high-sensitivity to surface topography. If you need to add a high-precision measuring system to your production line, consider acquiring an interferometer. Your shop floor or metrology lab will benefit greatly from the addition of one.
That said, if flexibility in your budget is an issue, Excedr can help. Our leasing program makes accessing top-of-the-line metrology equipment and technology possible when you don’t want to spend an enormous of capital upfront on new machinery.
Receive an interferometer lease estimate today or simply get in touch to learn more about our program and its benefits.
This off-balance sheet financing structure provides three options at the end of the term. The lessee has the option to return the equipment to the lessor, renew at a discounted rate, or purchase the instrument for the fair market value. Monthly payments are also 100% tax deductible which yields additional monetary savings.
If you recently bought equipment, Excedr can offer you cash for your device and convert your purchase into a long-term rental. This is called a sale-leaseback. If you’ve paid for equipment within the last ninety days, we can help you recoup your investment and allow you to make low monthly payments. This also frees up money in your budget rather than tying it down to a fixed asset.
Interferometer Manufacturers & Models on the Market
DynaFiz, Verifire, ZMI, Verifire MST, Verifire HD/HDX, Verifire XL
SR, HR, HRx, S300, SR LUPI
AccuFiz D, AccuFiz SIS, PhaseCam 6110, PhaseCam 6010, PhaseCam NIR
VI-direct, IV-direct 50 PUL, IV-direct 28 SUL, Micro-Interferometer VI-direct
MarOpto MT, MarForm MFU 200 Aspheric 3D, MarOpto FI 1100 Z, MarSurf WI