Do you need a small number of LEDs for your proof of concept? Or, are you looking to purchase a run for your prototypes? Visit our online stores at Digi-Key Electronics and Mouser Electronics today. In Japan, our products are now available through Rikei Corporation. In Israel, our products are now available through Militram. In Canada, our products are now available through ARL Group.

With the ability to detect light in the UV, visible, and infrared spectrums, photo detectors, photo transistors, and photodiodes are being used in increasingly more applications.

In addition to InGaAs infrared detectors, Marktech offers a range of standard silicon detectors such as photodiodes (SiPDs), phototransistors, and avalanche photodiodes. Our silicon detectors have a spectral sensitivity of 400 nm to 1100 nm for optical switching, Vis-NIR sensing, position sensing, laser alignment, light & laser monitoring, spectroscopy, oximetry, and other applications requiring high-speed, consistent, and high-reliability performance. Marktech also have detectors using a combination of multiple InGaAs and Silicon photodiodes, which enables detection from 250nm to 2600nm.

Photodiode chip active area sizes from 0.08mm to 3.0mm enable the optimal selection of low dark current, high speed, light sensitivity, and other detector characteristics for specific applications. InGaAs photodiode applications include fiber optics and free-space optical communications, medical diagnostics (glucose and blood gas), NIR-SWIR monitoring, IR laser alignment, infrared position sensing, spectroscopy, chromatography, and chemical analysis.

UV detectors are offered in a variety of TO metal-can type packages from TO-18 to TO-39 with special UV glass lens to insure optimum lifetime and the least amount of material degradation

Marktech offers a broad line of silicon photo Transistors in a variety of package types ranging from miniature metal can to ceramic packages.

Infinity corrected objectives are ideal for machine vision inspection and life science applications. When imaging biological samples such as dermal tissue, it is important to understand what can be achieved with different objective magnifications. 5X and 10X objectives are ideal for seeing groups of cells and slight structures in the extracellular matrix. 20X and 50X objectives provide greater resolution and are capable of seeing intracellular molecules.

Multiple InGaAs photodiode elements are available in linear and quadrant array format. Monolithic arrays and quadrants are available in 1.7μm cut-off InGaAs with 600nm to 1700nm spectral sensitivity material. Assembled arrays and quadrants are available in 2.6μm cut-off InGaAs with 800nm to 2600nm spectral sensitivity material.

Marktech offers the broadest range of UV LEDs commercially available ranging from 235nm to 400nm including UVA, UVB, UVC, and deep UVC LEDs.

InGaAs Photodiodethorlabs

InGaAS photodetectors minimize unwanted signal interference and provide reliable and accurate measurements. Our InGaAs photodiodes can be packaged with thermoelectric coolers (TECs) and transimpedance amplifiers to further improve signal-to-noise ratios, resulting in improved data quality and enhanced measurement accuracy.

The four application examples detailed in the following sections utilize Edmund Optics infinity corrected objectives. Mitutoyo objectives can be substituted as well. Although Mitutoyo objectives are synonymous with machine vision and industrial inspection, they perform extremely well in low light conditions and applications that focus on cellular and micro inspection.

In the optics industry, microscopes are used for both machine vision and life science, or biological, applications. Machine vision applications support semiconductor, electronics, assembly, and manufacturing markets, to name a few. Life science applications look at cellular or biological samples at various objective magnifications. To understand the interplay between resolving power, magnification, and other common objective specifications for life science, consider how an infinity corrected objective images skin culture at 5X, 10X, 20X, and 50X magnifications.

Custom photodiode detectors are designed to meet unique customer requirements, offering specialized performance features and cost savings through optimizations such as integrated filters, photodiode arrays, and hybridization.

Crafted with the latest LED technology, these rings provide adjustable illumination to meet specific needs, ensuring optimal visibility and enhancing the quality of your projects.

Our High-Reliability Photoreflectors are sensors that contain both the LED emitter and photodetector functions within a single package.

InGaAs photodioderesponsivity

In the medical and biotechnology industries, SWIR sensors using InGaAs IR detectors are invaluable for applications such as detection of glucose, urinalysis, and many other biomarker. Th SWIR wavelength ranges have been dubbed the medical diagnostic fingerprint spectrum due to importance in sensing many biomarker molecules. Their exceptional sensitivity and precision allow for accurate measurements of biomolecules, helping researchers and healthcare professionals advance diagnostic techniques and develop new treatments. Multiple LEDs across the UV-visible-NIR-SWIR spectrun can be combined with our InGaAs and silicon detectors to enable rapid quantification with dispersive technology.

Marktech offers the broadest range of emitters commercially available ranging from 235nm to 4300nm across the UV, visible, NIR, SWIR, and MWIR spectral ranges.

Monolithic “quads” or quadrant photodiodes (QPDs) are 2 X 2 photodiode arrays with four planar diffused photodiode elements or segments.

Multiple LED dies combined in a single package are engineered to address various applications across the UV, visible, NIR, SWIR, and MWIR spectral ranges.

CREE LED through-hole emitters, designed for high-temperature and moisture environments with UV-resistant optical-grade epoxy, offer a range of colors for versatile applications in signage and lighting.

Marktech’s CREE LED XLamp® offerings on aluminum core starboards simplify LED integration for designers, providing a range of colors and angles on compact boards for easy testing and implementation in varied lighting applications.

Marktech InGaAs photodetectors exhibit rapid response times, enabling them to capture fast-changing infrared light signals. This characteristic is critical for applications that demand real-time measurements or involve high-speed data transmission such as free space and fiber optic communications.

Marktech Optoelectronics introduces its new product line of CREE LED die, including the EZ1350 Series Die, packaged in TO-cans (TO-18 and TO-39 outlines) designed for precision and reliability in demanding applications with protection against environmental factors like moisture and dust.

Made-to-order semiconductor chips (die) and wafers are designed and fabricated to fit your needs. Standard dies are available in specific wavelengths for high-volume production applications.

Our InGaAs infrared sensors operate across a broad range of wavelengths, from visible (600nm) to short wave infrared (SWIR). This versatility makes them suitable for diverse applications in different industries, accommodating a wide range of light sources. InGaAs photodiodes can function both as a SWIR sensor, NIR sensor, and visible light sensor.

InGaAs photodiodes have more thermal stability or a lower temperature coefficient of sensitivity (< 0.1% / K) over a broader range of wavelengths than silicon. As a result, our InGaAs photodiodes are ideal as the primary detector elements in non-dispersive spectrometers (Vis-NIR-SWIR), pyrometers, and medical diagnostic devices.

Figure 1 was captured using #59-876 5X M Plan Apo Objective. This infinity corrected objective has a numerical aperture of 0.14, field of view on a ½" sensor of 1.28mm x 0.96mm, and resolving power of 2μm. Since typical human cells are roughly 10μm in size, the objective specifications for #59-876 make it the ideal choice.

Infinity corrected objectives image well, no matter the magnification. They are ideal for applications requiring high precision and the modularity of adding optical filters, polarizers, beamsplitters, and in-line illumination components into the optical path. However, there are tradeoffs for using infinity-corrected objectives:

From monitoring air quality to studying climate change, InGaAs photodetectors enable precise measurement of moisture and and are ky element in certain gas sensors. A high sensitivity infrared light detector is key technology for moisture, chemical, and biomarker sensor development.

InGaAsdetector

In Figures 1 – 4, the samples for inspection are 3D Skin Culture Models with a Trichrome Stain, which was cultured and prepared by Zen-Bio Incorporated located in Research Triangle Park, North Carolina, US. In Figure 1, it is clear to see cellular components surrounded by the extracellular matrix (ECM), which holds the tissue together. Within the ECM are the interstitial matrix and basement membrane, where polysaccharides and fibrous proteins reside and act as a compression buffer against external stress. Within the basement membrane reside a number of sheets that are stacked upon one another with epithelial cells resting between. To clearly see the polysaccharide gel and epithelial cells, it is best to use a high magnification infinity corrected objective. The tissue matrix is the surrounding blue stained material, the cells and cellular membrane are marked by the purple stains, and within each cell is a smaller white and partially red stained region that marks denser intracellular material, such as mitochondria and the nucleus.

Our NIR LED wavelength range is typically from 700nm to 1000nm, extending into wavelengths invisible to the human eye but crucial for numerous technological and scientific applications.

As our industry constantly changes and evolves, Marktech has been there since the start. Stay on top of new and upcoming technology trends, industry news and new product offerings.

InGaAs photodetectors are extensively utilized in aerospace and defense applications, including infrared receivers in satellite communication systems, remote sensing, and laser rangefinders. SWIR detectors can detect through fog, smoke, and some plastics. These detectors withstand harsh environmental conditions, ensuring reliable and accurate data acquisition for critical missions and surveillance operations.

Our advanced line of visible LED products is engineered to deliver high-quality, energy-efficient lighting solutions across various applications from 400nm to 700nm..

Hamamatsuphotodiode

Marktech Optoelectronics is one of the world’s leading manufacturers of UV, visible, near-infrared (NIR), and short-wavelength infrared (SWIR) emitters and photodiode detectors. The company also engineers and manufactures materials such as silicon photodetector wafers, chips, and InP epiwafers.

Multi-LED chips in a single package, our multiple wavelength LEDs are engineered to address a myriad of applications across the UV, visible, NIR, SWIR, and MWIR spectral ranges

Siliconphotodiode

Bare and encapsulated LEDs, photodiodes, and other components are assembled on FR4, metal-cored, and flexible circuit boards, ready for production.

Designed to produce a highly defined red dot or reticle, facilitating accurate aiming without revealing the location to the target.

Marktech Optoelectronics combines over 40 years of expertise in optoelectronics with a focus on customized engineering solutions, addressing specific customer needs and applications.

Our standard product offering includes wavelengths from 1020nm to 4300nm and operating currents ranging from 20mA to 350mA for high-power applications.

Ingaas photodiodeprice

To succeed, you need the exact optoelectronic package custom-designed and manufactured for your application, including hermetic metal SMD, TO-can, plastic SMD, and molded through-hole packaging.

InGaAs photodiodes are becoming increasing important in LiDAR and position sensing system using 1550nm laser light source. At 1550nm, laser beams with forty times more power can be use compared to 940nm without risking eye damage. InGaAs photodiodes are more effective than silicon in many active infrared sensor applications. We can combine our infrared detectors with infrared LEDs for infrared reflective sensor or infrared photoreflector applications.

CREE High Brightness (HB) SMD LEDs are the brightest, most reliable architectural, video, signage, scoreboard, roadway, and specialty LEDs available today.

ExtendedInGaAs photodiode

Through our vertically integrated manufacturing facilities in California and Japan, we offer custom LED solutions, including packaging and optoelectrical categorization, enhancing product design and market readiness.

Our panels are crafted to deliver uniform, vibrant illumination across a wide range of applications, from consumer electronics to industrial displays.

Knowledge Center/ Application Notes/ Microscopy Application Notes/ Understanding Infinity Corrected Objective Resolving Power and Magnification

There are a large number of applications for infinity corrected objective systems. In terms of biological applications, the most common is fluorescence microscopy, ranging from the most basic fluorophore detection systems to the more elaborate confocal and multiphoton fluorescence systems. The most complex of these systems involve high magnifications, precision mechanics, high-quality optical filters, and powerful illumination sources, such as lasers. In contrast, the simpler systems involve a standard broadband light source, basic filtering, simple mechanics, and low to high magnifications depending on the samples under inspection.

Our Point Source LEDs are specifically engineered for optical encoders, edge sensors, and other critical applications that demand highly focused light with minimal dispersion.

InGaAs PIN photodiodes are available in various package types such as hermetically sealed metal cans (TO-5, TO-18, TO-39, and TO-46), ceramic SAW packages, pigtail metal cans, 3mm molded plastic through-hole (flat lens or dome ceramic), and Marktech’s latest enhanced packaging system – the seam welded surface mount device (SMD) ATLAS package. InGaAs detectors in our hermetic ATLAS package have superior protection against oxygen and moisture ingress. The compact SMD form factor is highly suited to high-volume manufacturing. In addition, the low profile of ATLAS packaged InGaAs detectors is useful in wearable applications. We can also incorporate the photodetector die into custom-designed assemblies.

Please select your shipping country to view the most accurate inventory information, and to determine the correct Edmund Optics sales office for your order.

Figure 3 was captured using #59-878 20X M Plan Apo Objective. This infinity corrected objective has a numerical aperture of 0.42, field of view on a ½" sensor of 0.32mm x 0.24mm, and a resolving power of 0.7μm. Figure 3 displays the entire cell within the given field of view; the surrounding extracellular matrix is sectioned in greater detail, and the intracellular molecules are much larger and more visible than in either Figure 1 or Figure 2.

CREE LED’s P4 series represents a leap in LED design, combining efficiency with aesthetic versatility to meet the demands of modern lighting applications.

InGaAs photodiodes are indispensable component in measuring light intensity and wavelength, especially in infrared detection, near infrared detection, and shortwave infrared (SWIR) detection.. They are extensively used in fields such as IR spectroscopy, fluorescence, and radiometry to facilitate accurate data collection, enabling breakthroughs in physics, chemistry, biology, and more.

Siliconphotodioderesponsivity

Figure 2 was captured using #59-877 10X M Plan Apo Objective. It has a numerical aperture of 0.28, field of view on a ½" sensor of 0.64mm x 0.48mm, and a resolving power of 1μm. In this image, it is clear to see the stacking and weaving of the ECM and interstitial structures. Additionally, the cellular membrane is very pronounced and it is evident that there are a number of intracellular structures such as ribosomes, mitochondria, and a large nucleus present at the central position.

As a proud CREE LED Solution Provider for over a decade, Marktech offers comprehensive engineering support, including design, binning, and material selection, alongside custom packaging options for specialized applications.

InGaAs photodetectors are compact and lightweight, making them ideal for integration into various devices and systems. Their small form factor of these IR photodiodes allows for easy incorporation into portable instruments, medical devices, wearables, optical sensors, and other space-constrained applications.

Marktech’s lineup of advanced InGaAs photodiode detectors consists of two detector families or series based on their spectral sensitivity ranges:

Since many modern fiber optic communication system use 1550nm light, InGaAs photodetectors are the key link of modern optical communication systems. By converting light signals into electrical signals, these detectors enable efficient and high-speed data transmission in fiber optic networks, ensuring seamless connectivity for telecommunications, internet services, and data centers.

Depending on the sample, there are a few rules of thumb to help with the selection of an infinity corrected objective. A typical cell has a size of 10μm; a low magnification and low resolution objective is suitable for imaging a grouping of cells. If one needs to differentiate cellular membranes or intracellular components such as mitochondria, ribosomes, or a nucleus, then resolution on the order of 1μm or less is best.

Most of Marktech’s standard InGaAs detectors do not have or need an integrated Thermal Electric Cooler (TEC)  because the photodiode already have exceptional responsivity. In many applications, thermoelectric cooling or amplification is not required, which reduces cost and improved overall efficiency. However, TECs, transimpedance amplifiers (TIAs), and other components can be custom packaged with our InGaAs detectors for special applications requiring lower dark current and higher signal to noise (S/N) performance.

Magnification, numerical aperture, working distance, and resolution are all related for infinity corrected objectives. Magnification is calculated by dividing the focal length of the tube lens by the focal length of the objective. Numerical aperture (NA) is a function of the focal length of the entrance pupil diameter; NA affects the amount of light entering the infinity corrected system. Working distance (WD) is determined by the parfocal distance of the objective’s optical path; WD is specified as the distance from the front optical element to the object under inspection. Resolving power is one of the trickiest specifications to properly explain. Since it is difficult to visualize what an actual object under inspection will look like at a particular magnification and how to quantify resolving power, it is best to learn by studying the application examples in the following sections. For additional information on key objective terminology, view Understanding Microscopes and Objectives.

InGaAs photodiode detectors offer exceptional sensitivity, allowing them to detect even the faintest traces of light in the near infrared (NIR), short wave infrared (SWIR), and extended SWIR spectral ranges. This sensitivity is often a key enabler in many medical diaghostic and chemical analysis applications. InGaAs infrared detectors are often the optimum choice for applications requiring superior infrared sensor technology.

In addition to its InGaAs PIN photodiodes, Marktech offers foundry services for the epitaxial growth of SWIR wafers in the 1.0 um to 2.6 um range, using InP material as the base substrate. Marktech is currently producing these high-reliability wafers in 2″, 3″, and 4″ diameters. Among the applications for these wafers are photodetectors, linear arrays, and image sensors. Photodetectors processed using our epitaxial wafers provide significant advantages, including lower dark current, better shunt resistance, and improved performance at lower operating temperatures.

Figure 4 demonstrates 50X magnification - the highest magnification easily achieved without mechanical stages or piezo actuators stabilizing the infinity corrected objective and image plane. At this magnification, slight vibrations from an illuminator or computer’s fan can cause the video feed to dramatically shake and jump out of focus. Figure 4 was captured using #59-879 50X M Plan Apo Objective. It has a numerical aperture of 0.55, field of view on a ½" sensor of 0.128mm x 0.096mm, and a resolving power of 0.5μm. The depth of focus for this particular objective is only 0.9μm, making focusing a tedious process if the appropriate mechanics are not utilized. In Figure 4, the cellular membrane and intracellular components are very clear and vibrant compared to the previous 5X, 10X, and 20X images. Also, the size and shape of the cellular constituents become truly evident. When comparing Figure 1 (5X magnification) to Figure 4 (50X magnification), the increase in magnification is immediately apparent. The resolving power increases by four and the field of view is minimized by a factor of twenty. When imaging at 50X magnification, high light intensity and contrast is required to increase illumination and to digitally adjust shutter speed and gain. The digital settings can be set to automatically compensate for darkness or frame rate – excellent for constructing a digital video microscope for the first time. For additional details on constructing one with off-the-shelf components, please read Digital Video Microscope Objective Setups.