Marktech Optoelectronics Releases New Green and Red Dot LEDs – Just in Time for the Holidays

Marktech’s Introduces Standard Green Dot LEDs and Expands Red Dot LED Line-up

Marktech Optoelectronics, Inc. (, a privately-held leading designer and manufacturer of standard and custom optoelectronics, including UV, visible, near-infrared (NIR), and short-wavelength infrared (SWIR) emitters, detectors, InP epi wafers, and other compound semiconductors, today announced the release of their enhanced sharpness 25 and 50 micron green dot point source LEDs (MTSP-1358 and MTSP-1360) for reflex sights, riflescopes, sports optics, camera viewfinders, and other aiming applications. In addition, Marktech expanded their offering of red dot LEDs with additional micron sizes and package types.

Our green dot LEDs utilize a “true green” 520nm wavelength, which appears brighter to the human eye compared to a 650nm red point source with equivalent power output. Green dots appear “brighter” because the rod receptors in the human eye have the more response to 520nm green light than 650 red light. However, red dots are still desirable in many applications. For instance, if the background, foliage, or target is a similar shade of green, then a red dot might be a better option.

Standard red dot LEDs micron sizes include 25 µm, 50 µm, 80µm, 100 µm, and 150 µm. Red dot LEDs with micron sizes of 10µm, 13µm, 30µm, 40µm, and 60µm available on a custom basis. Our standard red dot LEDs are available in two package types: a 2.1×2.1 SMD Flat Lens and a 1.6×1.5 SMD Flat Lens. Several additional package type options are available such as chip on board (COB) and flex circuit. Marktech can also custom design package for OEM needs.

Marktech’s 2.1mm x 2.1mm package for dot or point source LEDs.

Marktech’s red dot-circle-cross reticle LED with individually addressable elements.

Marktech can assemble the red dot or reticle die into various standard and custom packages as well as chip-on-board (COB), rigid PCB, and flexible circuit assemblies. We have also incorporated our avalanche photodiode (APD) detectors in conjunction with red dot and display reticles for riflescopes, binoculars, LIDAR speed guns, and rangefinders with laser distance, speed, or range measurement capabilities.

Red Dot LED Product Applications
The typical function of red dot and reticle LEDs is aiming or targeting. The red dot appears within the riflescope or reflex sight. The reflected image of the red dot LED on the optical lens provides a virtual spot on the target. Unlike aiming lasers, a visible laser spot does not appear on the target, so the prey or target cannot see the spot. In addition, specialized coatings are used on the optics to enhance reflections or the red light wavelengths from the LED, which reduces the appearance of the red dot to prey, enemy combatants, or other targets.

While the recognized leader of premium red dot LEDs to the optical scopes industry, Marktech red dot and reticle LEDs find additional applications outside riflescopes and gun sights. Laser rangefinders and LIDAR speed guns often utilize a red dot aiming sight to target an object for measurement. Telescopes have a narrow field of view and require finderscopes or red dot finders to locate specific stars or constellations. An increasingly popular application of red dot LEDs is on cameras. A red dot viewfinder on a camera is helpful in the photography of fast-moving objects.
Red dot, reticle, and alphanumeric LEDs benefit a wide range of applications, including:

  • Riflescopes
  • Reflex Sights and Red Dot Sights
  • Illuminated Reticle Scopes
  • LIDAR Speed Guns
  • Optical pyrometers
  • Telescope Finderscopes or Red Dot Finders
  • Night Vision (NV) Devices
  • Rangefinders & Range-finding Binoculars
  • Camera Red Dot Viewfinders
  • Stage Lights and Spot Lights
  • Ocular Displays in Microscopes and Medical Optics
  • Displays in Smart Glasses, Goggles, and AR/VR Devices
  • Head-mounted display in scuba masks and helmets
  • Optical encoders
  • Edge sensors
  • Proprietary OEM Optical Assemblies.

Packaging Options

Marktech’s dot and reticle LEDs are available in various package types depending on the requirements of your application. For instance, our 25µm and 50µm red dot LEDs are available in both a 2.1mm x 2.1mm SMD packge and a more compact 1.6mm x 1.5mm SMD package. For applications requiring a larger package such multiple dot LEDs, reticle LEDs and microdisplay LEDs, we have 3mm x 4mm frameless SMD, COB, flex circuit, and custom designed packaging options.

Point Source LEDs

Our small 10 µm diameter red dot LEDs and visible or NIR point source LEDs can replace lasers in specific applications. They are also used as emitters in optical encoders, position sensors, edge sensors, light barriers, and other sensing applications. For sensing applications requiring higher power visible or infrared (IR) emission, Marktech has a series of point source LED emitters from the 620nm to 650nm in the visible band and from 750nm to 980nm in NIR band.

“We are proud to offer our customers what we believe are the best dot or point source LEDs in the market. Our innovative manufacturing processes and rigorous inspection ensure that every green, red or NIR point source we produce meets the highest standards of clarity, brightness, and durability. Whether you need a standard or custom red dot LED or point souc, Marktech can deliver it with speed and efficiency.”
Vince Forte, Chief Technology Officer

Consult with Us Today About Your Design Project Marktech has advanced optoelectronic engineering and manufacturing capabilities to design and fabricate high-accuracy red dot point source illuminators. Our manufacturing facility in Simi Valley, California, can precisely control the performance and quality of the green or red dot point source LEDs, reticle LEDs, and 7 or 14 segment LED microdisplays through our high-precision packaging and assembly processes. As a result, Marktech’s stock and custom point source LEDs have unexcelled sharpness, clarity, and are virtually free from any internal reflections or defects. Our green dot, red dot and reticle LED experts can tailor existing or design new products to accurately meet the performance specifications of riflescopes, gun sights, laser speed guns, camera viewfinders, finderscopes, and aiming products under design or redesign. Using Marktech Optoelectronics’ advanced LED reticles, segmented LED microdisplays, and green or red dot LED emitters in new products under development will likely lead to breakthrough designs in many sports optics, cameras, telescopes, rangefinders, and other optical assemblies requiring precise aiming and ocular or eyepiece displays of information. If you have specific technical or application questions regarding your design project requiring red dot point sources or illuminated reticles or are just interested in learning more about Marktech’s red dot LED and reticle LEDs, then please reach out to us through the following:
  • Contact our application engineers: [email protected]
  • Request for information (RFI) or request for quote (RFQ) form: Contact Us
  • To discuss your development project, contact:
    Vince Forte, Chief Technology Officer or [email protected] Tom Behringer, Vice President of Sales [email protected]

Buying Your Engineer or Scientist a New Photodiode for Christmas? 8 Questions to Ask When Selecting A Photodetector Manufacturer

Marktech’s innovative hybrid and silicon-InGaAs detectors.
Si-InGaAs photodiodes can enable broadband detection from 254nm to 2600nm

1. How extensive is the photodiode manufacturer’s product offering? Do their photodiodes have the wavelength sensitivity, speed, active area, and other performance parameters to meet your photo- detection requirements?

The supplier should have a broad enough product line to meet your current and future needs.

They should have photodiodes in their line-up meeting your application’s wavelength sensitivity, speed, dark current, and size needs. For example, Marktech produces both silicon and indium gallium arsenide (InGaAs) photodiodes, which provide a wavelength sensitivity range from 250nm to 2600nm – or, over the ultraviolet (UVB), visible, near infrared (NIR) and short wave infrared (SWIR) bands. Marktech has an extensive line-up of photodiode detectors with these wavelengths with a range of active areas and package types. However, suppose the supplier only has one or few types of photodiodes. In that case, photodetectors may not be their main focus. As a result, they will not be able to provide as many choices, assistance in selecting the suitable detector, and guidance in developing detector specifications.

Marktech has 500+ standard or catalog detectors, LED products, and over 3000 customized products. Most catalog products are available immediately through our distributors, Digi-Key Electronics and Mouser Electronics.

In 2021, Marktech products became available in Japan through our latest partner, Rikei Corporation. Established 65 years ago in Tokyo, Rikei Corporation is a trusted trading partner and value-added solutions provider serving many electronic original equipment manufacturers (OEMs) and communications companies. Rikei excels in system integration and component distribution, leveraging superior procurement skills, deep domain knowledge, and expertise in systems technology and electronics for high-quality solutions throughout the project lifecycle.

Marktech also has sales engineering representatives in Canada (ARL Group), Israel (Militram), and France & Germany (Syscom-Prorep). Our extensive offering and ability to tailor products to specific OEM design specifications have long set Marktech apart from other optoelectronic manufacturers. For example, Marktech’s photodiode detectors have various wavelength sensitivity ranges, active area sizes, and package types including TO can, SMD, PLCC, through-hole, and hermetic SMD packaging.

2. Are they familiar with specifying photodiodes for your industry application? Can the manufacturer modify or customize their photodiodes to suit your needs?

Custom 64 element Si PDA for ice particle measurements on aircraft wingtip.

The supplier should be familiar with your application or ideally developed or customized photodetectors for similar use cases. Every application can have unique details necessitating intricate modifications to detector specifications to enable viable detection levels. Off-the-shelf or catalog photodiodes can be sufficient for less demanding applications. However, we have found in many cases that customization of a photodiode in terms of wavelength sensitivity, active area size, package type, and hermetic properties can increase the overall performance and reduce the total cost of your design. The custom component cost might be slightly higher, but reducing part count and simplifying circuit designs can result in a total cost benefit. In addition, Marktech can further customize photodetector designs by adding amplifiers, thermionic coolers, and LED emitter in the same package. Marktech can also apply anti-reflective coatings and filter coatings to windows or lids. Marktech has partnered with many OEMs to develop specialized InGaAs and silicon photodiode detectors for aerospace, analytical instrument, automotive, automation & industrial sensing, medical, and wearable applications. Our products can be found on satellites, top-tier automobiles, non-invasive medical diagnostic devices, position sensors, spectrometers, refractometers, laser alignment systems, and colorimeters.

3. Does the supplier produce LED emitters with your application’s wavelength, power output, and package type?

Position sensing, spectrometry, refractometry, LiDAR, security, and other industrial applications often use photodetectors in conjunction with an LED emitter or light source. Therefore, the manufacturer should have LED emitters with the wavelength and power ranges to complement the photodetector selected. Marktech has an extensive line of LED emitters to provide the proper light source for InGaAs and silicon photodiode detectors selected. Marktech’s testing laboratories can evaluate both emitters and detectors. In addition, our labs can customize or sort LEDs to tighter or lower variations in peak wavelength (±1nm). Our optoelectronics engineers and LED experts can further customize LEDs with packaging and assembly options such as flex circuits, COB, and PCB.

4. How long has the photodiode manufacturer been in business under the same ownership? Are they increasing in size, facilities, and capabilities?

The photodiode manufacturer should be a stable business. If the manufacturer has changed hands through acquisitions or bankruptcies, closed factories, or cut many detector product offerings, then the supplier may not be the best supplier. Instead, look for an established supplier with stability and expanding product offerings, capabilities, manufacturing plants and testing laboratories. Marktech was founded in 1985 by Mark Campito, a Navy veteran, who is still the CEO. Marktech has continuously focused on testing and invested significantly in creating world-class optoelectronic testing laboratories capable of analyzing photodiode detectors and LEDs. Marktech’s philosophy is that optoelectronics testing is crucial in maintaining product quality and consistency. In 2021-22, Marktech upgraded our detector and LED testing facilities in Latham, NY. Marktech also installed extensive burn-in test capabilities for component and assembly evaluations. In 2014, Marktech built and opened a new state-of-art silicon photodiode manufacturing plant in Simi Valley, California. Marktech Optoelectronics has continuously operated in New York State since 1985.

5. Does the supplier have a history of innovation, quality, and reliability? How often are new products added to their line-up?

Cutting-edge optoelectronic design require a supplier with innovative product and a willingness to customize and try new approaches, and expand the capabilities of their photodiode when required by a customer’s application. The frequent additions of new products to a photodiode manufacturer’s catalog indicates growth and innovation. Marktech is constantly adding new and innovative product to their portfolio of photodetectors and LED emitters. In addition, Marktech’s photodiode detectors are recognized and sought after for their integrity and reliability. In 2023, Marktech’s ATLAS Hermetic SMD Packaged InGaAs Photodiodes won the Best of Sensor award in the Aerospace/Space category at the Sensors Converge conference and exhibition. The award demonstrates Marktech’s ability to develop and manufacture high performance photonics products. Marktech’s award winning, compact hermetic SMD ATLAS packaged InGaAs photodiode (right) compared to a bulky TO can packaged detector (left).

6. Is the photodiode supplier an integrated optoelectronics manufacturer?

Ideally, the photodiode supplier you select will be “integrated” or manufacture the photodiodes device at the wafer level, dice the wafers into photodiode chips, package the chips, and when required assemble onto printed circuit boards (PCB, COB, flex circuits). Manufacturing integration provides more control of the quality and consistency because a single company oversees every step of the photodiode manufacturing process. There is no finger-pointing between suppliers, and any quality issues are quickly identified and resolved. New photodiode detectors are rapidly developed and delivered as well. Marktech is an integrated InGaAs photodiodes manufacturer. Our InGaAs photodiodes are fabricated on our Custom Designed MOCVD chambers in Japan. The InGaAs detector die are packaged, assembled, and tested in the same facility. Our Japanese factory has extensive optoelectronic engineering and photodiode design expertise.

Our InGaAs photodiode detector factory in Japan

7. Can the manufacturer fully test the characteristics of photodiodes and LEDs? What type of testing facilities does the manufacturer have for evaluating photodiodes and LED emitters?

The ability to test is essential in assuring quality, troubleshooting application problems, and simulating field conditions. In some cases, testing can show how variations in the application or use of a photodiode causes detection issues, which can be resolved through packaging, end-product design changes, or photodiode chip specification adjustments. Marktech has extensive expertise and laboratories for optoelectronic testing of both detectors and LED emitters.

8. Will the manufacturer be able to deliver in time to meet your design project schedule? Does the supplier have catalog or standard photodiodes available through major distributors? Where are their photodiode manufacturing facilities located?

Photodiodes should be manufactured in a country without supply chain issues arising from COIVD shutdowns, political upheavals, sanctions, or transportation problems. Ideally, your photodiode supplier should be located near your factory or within the same country. If the manufacturer has a catalog or standard offering of photodiodes, then these products could be delivered rapidly. In addition, while the specific photodiode might have to be customized for your application, a standard photodiode might help move the development process forward and collect data to finalize the photodiode specification.

Marktech has manufacturing facilities in Simi Valley, California and in Japan. We have extensive optoelectronic engineering and testing laboratories in Latham, New York and in Japan. Marktech has one the shortest delivery lead times in the photodetector industry for standard and custom photodiodes. Marktech’s standard photodiodes are available through Digi-Key Electronics and Mouser Electronics, so there is still time to order a new photodiode optical sensor for your special person.

Photodiode Supplier Checklist
Wide Selection of Photodiodes in Spectral Range
Can Customize Photodiodes to OEM Needs
Has LED Light Sources in Spectral Range
Established, Growing Manufacturer
Demonstrated Innovation & Reliability
Integrated – Wafer to Packaged Detectors
In-House Optoelectronics Test Lab
On-time delivery of Components

Next Steps

If you have specific technical or application questions regarding your optoelectronics design project or are just interested in learning more about Marktech’s silicon and InGaAs photodiodes, then please reach out to us through the following:

  1. Contact our application engineers: [email protected]
  2. Request for information (RFI) or request for quote (RFQ) form: Contact Us
  3. For major photodiode engineering projects, contact our U.S. factory directly: Vince Forte – CTO: [email protected], Barry Jones, Business Unit Manager [email protected]
  4. VISIT US AT SPIE Photonics West

If you can wait until after the holidays, then you can meet us at SPIE Photonics West 2024 in San Francisco Booth 237 to discuss your photodetection application with our experts.

About Marktech Optoelectronics

Marktech Optoelectronics, Inc. (, is a privately-held and veteran-owned leading designer and manufacturer of standard and custom optoelectronics, including UV, visible, near-infrared (NIR), and short-wavelength infrared (SWIR) LED emitters, silicon and InGaAs detectors, InP epi wafers, and other compound semiconductors.

Author & Media Contact:
Gary Kardys, Business Development Manager
[email protected]