Wavelength Specific Lighting
Spectrum engineering for a wide variety of wavelength specific designs.
Light Emitting Diode technology has revolutionized the lighting industry by dramatically reducing the power required for illumination. However, constant research in the photonics industry continues to push the envelope in another direction, offering new spectral possibilities for lighting applications. The result is that lighting designers have access to a growing palette of colors to customize their lighting design. At the same time, photobiological, and photochemical research reveals the intimate connection between light and the biological, chemical and physical world. This opens up a completely new application area – wavelength specific lighting, and a new kind of engineering, spectrum engineering.
Everything from circadian rhythms to plant growth cycles are synchronized to light. Designers can now take various combinations of monochromatic LED light sources and combine them to optimize a spectrum for a specific life function. The Dark Sky protocol that protects wildlife from unnatural nightlight, lighting to keep shift workers alert, lights that repel pests, or horticultural lighting tuned to specific species and stages of plant growth are just the tip of the iceberg for wavelength specific lighting applications. Other examples of spectrum engineering are high CRI lighting to aid human inspection, while selective color temperatures can be used in supermarkets to enhance fruits, meat, bread, vegetables and seafood and vegetables.
Nemalux’s years of experience in custom LED applications and spectrum engineering, combined with our industrial design experience allows us to customize wavelength specific lighting for your unique commercial or industrial lighting application.
Wavelength specific lighting applications include:
- High CRI for improving human visual inspection
- Machine vision
- Worker alertness
- Display enhancement
- Insect repellent
- Counterfeit note detection
- Forensics and crime scene analysis
- Horticultural growth cycle and species
- A wide range of choice of monochromatic LEDs
- Spectrum engineering to your exact requirements
- Designed for harsh locations, extreme water resistance and corrosion resistance
- Thermally managed for maximum longevity
- Hazardous location option
- IP66/67/68 options
- Special powder coating for extreme resistance to corrosion
- Multiple models available
- Multiple mounting options
- Vented enclosure ensures long-term reliability
- 0-10v dimming
- Extended temperature range
Lighting that affects human psychology and physiology
Photonics has wide applications in the health and wellness industry from lights that affects the human circadian rhythms to treat Seasonal Affective Disorder to Jet lag. Visible red light from wavelengths of 630 to 700 nm penetrates tissue to a depth of 10 mm and is beneficial in helping heal wounds, infections and scars while infrared can penetrate to depths of 40 mm for treating organs and ailments affecting bones, joints and deep muscle tissues. UV light finds extensive use for disinfecting medical facilities and LEDs emitting 633nm to 830 nm have lesser known treatment modalities such as skin rejuvenation.
- Seasonal Affective Disorder
- Night Shift Workers
- Circadian Rhythm
- Lowers Blood Pressure
- Alzheimer’s treatment
- Optimal physiology
- Visual, Circadian, Neuroendocrine and neurobehavioral systems
- Ocular photo toxicity. Light and Immunomodulation.
Lighting to improve workplace alertness and safety
Lighting designers carefully choose the spectral content of light sources in order to affect the mood and alertness level of workers. Studies show that short wavelength blue light can improve performance and alertness during both day and night by suppressing sleep hormone melatonin and shifting circadian rhythms by about three hours. This is important especially for workers working night shifts or long hours. The proper lighting can prevent workplace accidents in industrial plants or long haul driving by keeping workers alert.
- Wavelength enhancement for increased alertness
- Short wavelength blue light for melatonin control
- Circadian rhythm delay
- Wavelength enhancement for affecting mood and emotions
BioFuel & Agriculture
Photonics for efficient plant cultivation in indoor growing or industrial process environments
LEDs find wide application in biofuel and indoor agricultural and indoor farming systems. Metal halide lamps have been traditionally used for growing biofuel crops but they are very power hungry. New LED lamps can reproduce the same critical wavelengths but use just 35% of the energy. Micro-algae and other plants grow more effectively with a combination red and blue light. Vertical hydroponics growers are working with large lighting companies like Philips to develop custom lighting formulas for growing each specific plant type. Since LEDs run cooler, they can be placed closer to the plants, ensuring a more uniform illumination. New indoor grow operations use less energy than conventional farming, producing organically grown and chemical free produce.
- Lighting for enhanced algae growth
- Lighting for enhanced flax seed oil production
- Red LEDs for enhanced flowering in indoor greenhouses
- Blue LEDs for enhanced vegetative growth in indoor greenhouses
- Green LEDs for working at night without disturbing plant dark cycle
Photonics and lighting for machine inspection, robotic guidance, gauging, verification and symbol reading
The function of machine vision is to light an object so that the reflected light maximizes the contrast of a specific feature, resulting in an image captured by the imaging device which can be used the image processor to make a pass/fail decision. Light will be reflected, transmitted and absorbed differently depending on the characteristics of the object being imaged. The spectral content of the light source is carefully chosen to increase the contrast of the image, bringing out the features clearly for machine vision algorithms to process them effectively. Light sources for machine vision can be any one of fluorescent, quartz halogen, LED, metal halide, xenon or High Pressure Sodium. The choice of sources depends on the specific application requirements, defined by 4 fundamental parameters of geometry, structure/pattern, sample and background wavelength and filters.
- Process control – production line inspection of products
- Robotic or other types of guidance
- Inspection for defects in infrastructure/buildings and materials such as airplane wings
- Gauging levels, orientations
- Identification and verification
- Text, barcode and symbol reading
Photonics for priming human perception or affecting space-appropriate emotional response
Photonics is applied in architectural spaces to perform such functions as enhancing moods appropriate for the space and affecting perceptions. In emergency waiting rooms, museums or some restaurants, soft lighting is used to calm people. In night shift operations, specific spectral components can affect circadian rhythms, melatonin levels and increase alertness. In retail, spectral selection affects consumer perceptions of products. In parking garages and some other public spaces, cold white light discourage loitering.
- Soft lighting for calming effect
- Short wavelength blue light for increasing alertness
- Cold white light for discouraging loitering
- Color enhancement for retail product enhancement
Photonics for digital lighting, the intelligent home, building automation and the Internet of Things
The next generation of lighting products will be smart or intelligent lighting, coupling advanced embedded microcontroller functions with lighting to allow lights to do multiple functions. Smart lights will be connected to digital controllers and sensor networks to create intelligent networks of lights for automated control, intelligent home, building automation, the Internet of Things and enter era of digital lighting. As sustainability becomes increasingly important, smart lighting will be used more and more to lower the carbon footprint of buildings and lit areas, turning lights on automatically when needed and off when not.
- Lighting and Building Automation
- Lighting Controls: dimming, on/off, digital outputs
- Internet of Things (IOT)
- Mobile Lighting APP
- Sensors for occupancy, motion, wavelength, temperature, digital inputs
Photonics for food safety and food inspection systems
Photonics finds wide application in the food processing industry. The area of hyper-spectral analysis identifies a spectral fingerprint for each of many types of potential food contaminants such as dangerous bacteria, a host of pathogens and external objects like metals, rocks, etc. Applied to a production line with machine or manual inspection allows culling of potential dangerous contaminants. Lighting for food inspection often requires special sealed lighting that can withstand being hosed down during cleaning and decontamination processes. A CRI of 99 is used for food inspection
- In-line inspection of food products for food safety and quality
- Hyper-Spectral analysis for contaminants
- wood (blue)
- metal (green)
- disease (orange)
- Visible and NIR (400 to 1000 nm) analysis for bruised strawberries
- Plant phenotypes and genomics
- Hyper-Spectral analysis for contaminants
High CRI Applications
Photonic applications where high fidelity, natural light is required along with low energy consumption
The Color Rendering Index (CRI) is a measure of how close a light source is to natural white light from the sun. The higher the CRI number, the closer the match. High CRI full spectrum lighting dramatically improves the appearance of objects. This is important in places like retail stores, super-markets, exhibits, museums and galleries where presentation and appearance are critical. High CRI lighting is also important in areas such as hospitals, textile or other industries where color differentiation is crucial in work performance. High CRI LEDs are ideal for applications which require sustainable lighting that requires maintaining a high quality of natural lighting.
- Film and photography
- Retail showrooms
- High end residential and hotels
- Textile factory
- Food inspection
Ultraviolet light for health, infection control, industrial processing, verification and criminology applications
Ultraviolet lights have many photonic applications. They are often used for bacterial disinfections of surfaces or surgical equipment in health facilities, to kill dangerous bacteria in surgical, dental and emergency situations. During the Ebola crisis, UV lights played an important role in protecting front line health workers. UV lights are also important for curing of resins and adhesives and decomposing chemicals in industrial applications. In the verification and forgery analysis industry, UV lights are used to detect signs of authentic as well as forged bank notes, credit card markings or forged changes to documents and art paintings. Specific proteins leave a UV fingerprint in urine and this is useful in the identification pet urine spots or in signs of rodents. Long wavelength UV light can identify oil leaks by different, easily distinguishable, fluorescent colors for engine oil, differential, wheel bearing, air conditioning system and brake fluid leaks. Criminologists use it for crime scene inspection of bodily fluids and for hydrocarbon detection in arson cases.
- Decomposition of chemical materials
- Sterilization and infection control
- Resin curing, adhesives
- Rodent control
- Urine detection
- Forgery detection
- Crime scene analysis for bodily fluids and hydrocarbons
OTHER APPLICATIONS INCLUDE:
- Car Navigation Use and System to assist pedestrians
- Vehicle Information and Communication System
- License Plate recognition
- ETC LED array use
- Night Vision Light Source use
- CCTV Light Source
- Machine Vision
- Agriculture and Food
- Oxymeter use
- Photodynamic Therapy (PDT) and Diabetes use
- Biometrics (Authentication):
- Vein Image use
- Iris Image use
- Face Image use
- Finger Image use
- Chemical reactor as reactive light source
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