In conclusion, the Modulation Transfer Function is a pivotal parameter for evaluating and optimizing optical systems. By understanding resolution, contrast, and how MTF combines these factors, optical designers can make informed decisions to select the right components and achieve superior image quality for their applications. MTF data serves as a powerful tool in the hands of those seeking precision and excellence in optical system design.

BARRINGTON, N.J., November 18, 2021 (Newswire.com) - Edmund Optics®, a leading global manufacturer and supplier of optical components, has constructed an in-house laser damage testing lab to verify that laser optics will function as intended in customers' laser applications. This internal testing allows Edmund Optics to provide guaranteed laser-induced damage threshold (LIDT) specifications and fine tune processes to manufacture higher-LIDT optics.

Laser damage Threshold calculator

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LIDTtesting

Resolution and contrast are fundamental factors in achieving sharp and clear images. Resolution pertains to an imaging system’s ability to distinguish fine object details and is typically expressed in line-pairs per millimeter (lp/mm), where each line-pair consists of a black line followed by a white line. Contrast, on the other hand, measures an optical system’s ability to distinguish between light and dark areas in an image.

Edmund Optics Gaussian beam Calculator

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High-quality optics excel in transferring contrast at higher spatial frequencies, which translates to higher resolution. To assess this ability, MTF comes into play. MTF quantifies a lens’s capacity to transfer the contrast of a sample to an image using spatial frequency (resolution). Spatial frequency is defined as the number of line pairs per millimeter (lp/mm). Typically, MTF is determined using test charts featuring alternating black and white lines.

Gaussian beam propagator

Edmund Optics® is a leading global supplier of optics, imaging, and photonics technology that has served a variety of markets including Life Sciences, Biomedical, Industrial Inspection, Semiconductor, R&D, and Defense since 1942. The company designs and manufactures a wide array of optical components, multi-element lenses, imaging systems, and optomechanical equipment, while supporting OEM applications with volume production of stock and custom products. Operating in more than a dozen major facilities around the globe, Edmund Optics employs just over 1,100 employees and continues to expand. Customers can purchase items by calling 1-800-363-1992, via the catalog, or on the website at www.edmundoptics.com.

MTF, as its name suggests, measures a lens’s capability to transfer contrast at specific resolutions from the object to the image. It combines both resolution and contrast into a single specification. As the line spacing decreases (frequency increases) on the test target, it becomes progressively challenging for the lens to efficiently transfer this decrease in contrast, resulting in a decrease in MTF.

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For instance, the imaging lens, camera sensor, image capture boards, and video cables each have their associated MTF. By analyzing the system MTF curve, designers can determine which combination of components will provide sufficient performance for a given application, considering factors like contrast requirements and resolution.

The Modulation Transfer Function (MTF) is a vital parameter used to assess the performance of optical systems, ranging from simple lenses to complex imaging lens assemblies. It serves as a standardized quantitative measure for optical designers and microscopists to evaluate and compare lenses for various applications such as DNA sequencers, cell analyzers, slide scanners, and industrial inspection equipment. In this article, we will delve into the details of MTF, exploring its components, significance, and applications.

LIDTlaser

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The LIDT lab features a high-power Nd:YAG laser with the options to test optical components at wavelengths of 1064nm, 532nm, 355nm, and 266nm for nanosecond pulse durations. Future investments in additional pulse durations and wavelengths are planned. The lab is run by Dr. Matthew Dabney, a Principal Laser Engineer at Edmund Optics. Dr. Dabney has over 30 years of experience researching how lasers interact with different materials. He is the author of over 30 published papers on topics including pulsed laser deposition of novel transparent conducting oxides, laser nucleation and growth of silicon, the safe use of Class 4 lasers in industrial settings, and developing a robust LIDT testbed.

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In traditional system integration, the resolution is often estimated based on the principle of the weakest link, assuming that the system’s resolution is solely limited by the component with the lowest resolution. However, this approach is flawed as every component within the system contributes to image quality, and the overall MTF of the system is the product of all the MTF curves of its components.

This in-house testing enhances Edmund Optics' internal manufacturing and coating of laser optics. In addition to testing products, the LIDT lab is playing a role in updating ISO 21254, the international standard for laser-induced damage specification. More details on the development of the LIDT testbed can be found in a recorded webinar by Dr. Matthew Dabney. For additional information on Edmund Optics' laser optics capabilities, visit www.edmundoptics.com/LO.

MTF is a powerful tool to quantify the overall imaging performance of a system in terms of resolution and contrast. Understanding the MTF curves of each imaging lens and camera sensor within a system allows designers to make informed choices when optimizing for specific resolutions.

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