What is blue light tester and explain its measurement system

The danger of blue light is pervasive. Sunlight is the most common source of indoor exposure, although you may also obtain it outdoors. A blue light tester device has measured this blue light hazard. In today’s technologically advanced society, many individuals spend most of their waking hours in front of a screen.
You’re exposed to artificial blue light when staring at a computer screen, a smartphone, or a television screen.
The wavelength range of blue light runs from 380 to 500 nm in the visible light spectrum. While the cornea and lens of the eye are generally good at filtering out UV rays in this range, the retina still receives some of the visible blue light that passes through them. Filters and protective eyewear have recently gained popularity due to the widespread awareness of the harm visible blue light can inflict on the retina.

What is a blue light hazard?
It is generally accepted that direct eye impairment and indirect effects on social welfare constitute the blue light danger. Blue light, found in most artificial light sources, poses this danger.
However, “pharmacotherapy” is the only context in which it should use this phrase. This idea stands for the photochemical dangers to the retinal tissues of the eye.
The term includes blue since the danger is amplified at shorter wavelengths in the visible light spectrum (between 435 nm and 440 nm).

Figure 1: blue light tester

Blue light hazard tester
Our EN62471-P blue light tester is the ideal measurement solution for evaluating the blue light hazard specified in IEC TR 62778, which deals exclusively with retinal blue light hazards as described in sections 4.3.3 and 4.3.4 IEC 62471.
It can find this hazard in both of those sections of the standard. The EN62471-P was explicitly developed to measure irradiance at 200 to 800 nm wavelengths. It offers high accuracy, precision, and data acquisition rates that come close to those typically seen only with array-based, multi-channel instruments.
Additionally, it has a better resolution and more than four excellent stray light suppression orders. The EN62471-P blue light tester is well suited for measurements in the manufacturing industry and the field due to its compact size and portable but durable construction.
Our EN62471-P tester can be outfitted with a comprehensive assortment of detectors, sensors, sources, radiance, and irradiance measurement accessories to carry out a complete suite of measurements and evaluate all potential health hazards by IEC 62471 from the UV, Visible, and IR spectral regions. These measurements are carried out to assess all potential health hazards.
The light biohazard values of LED lamps, UV lamps, and other luminaires can be determined with the help of a blue light hazard tester, which makes use of CCD long focal length and comprehensive spectrum technology to measure and analyze spectral blue light information and evaluate the blue light hazard of the lamp under test.

Who is vulnerable to Blu-ray damage?
Persons who fall into one of these three categories are vulnerable: young children, diabetics, and people who take medications after staff members. The eyes of infants are particularly susceptible to the harm caused by Blu-rays.
It is challenging to filter blue light through a baby’s eye’s lens since it is pretty clean. Between 0 and 2 years old, around 70–80 percent of blue light can pass through the lens and reach the retina. Between the ages of 2 and 10, approximately 60–70 percent of blue light will reach the retina.
To protect the newborn’s eyes from the potentially damaging effects of the blue light used in the treatment of neonatal jaundice, the attending physician must employ a dark cloth in this procedure. Diabetes, after ten years of development, has retinal lesions, the retina’s ability to tolerate the light damage is substantially diminished, there are medications, many of our lives in the drug is photosensitive, we eat the medicine, the light harm may be more apparent.
According to interviews conducted by journalists with medical professionals, there are no fewer than twenty different types of photosensitive medications. These drugs include doxycycline, ciprofloxacin, and oral hypoglycemic agents D-860, which are used more often. Patients taking these medications should exercise extreme caution when exposed to UV rays and take special care while outside.

The blue light hazard tester keeps you safe
Recently, much emphasis has been paid to the dangers of blue light. According to the standard IEC 62471, “blue light danger” primarily refers to the photochemical reaction generated by optical radiation between 300nm and 700nm, which ultimately destroys the retina.
Because there is a greater quantity of blue components in LED goods, and the brightness of bare LED light sources is sometimes relatively high, there is a possibility that blue LED light poses a dangerous concern.
Notably, the revised standard version enhanced the requirements for blue light dangers.
The revised standard incorporates several changes from the previous version, including an increase in the strictness of the standards for blue light risks, such as:
1) It should evaluate lamps with either a whole LED array or an LED module by IEC / TR 62778 to ensure they are safe for Blu-ray players.
2) Any lamps or nightlights designed for children that can be taken apart must not expose them to a blue light danger greater than RG1 at 200 millimeters.
3) If the blue light danger level measured at 200 mm is higher than RG1, it should highlight the “Do not gaze at the light source to see” sign outside the bulb.
4) If the observed distance of 200 mm from the fixed lamp results in a greater blue light danger than RG1, testing is required to establish whether the bulb is inside the RG1 critical distance.

Optical Radiation Measurement
Both artificial and natural light sources may be classified as optical radiation sources. Photobiological dangers from UV and infrared wavelength radiation may cause significant harm to the human eye and skin. Photobiological risks are mainly caused by exposure to ultraviolet light. However, exceeding safe exposure to visible light (primarily blue) and infrared radiation may also be harmful.
Lighting equipment manufacturers are required by international standards and legislative regulations (EN/IEC 14255 and EN/IEC 62471) to warn consumers about the photobiological dangers associated with their goods. Particularly useful for business owners who must adhere to rules governing lighting in the workplace, this knowledge is aimed squarely at those responsible for ensuring employees have a safe and healthy working environment.
LISUN provides a portable, high-quality instrument set that makes this complicated measurement much easier to perform.

Main functions
1)Optical radiation safety standards are fulfilled by the spectrum of light emitted within the field of vision.
2) Retinal blue light weighted radiation (LB) and the luminous radiation (KB, V) efficacy of blue light hazards.
3) Classification of Blue Light Hazard by IEC 62471 and IEC 62778.
4) Factors in topic rhythm.
5) Analysis of the blue and near-UV spectrums, etc.
6) Measures blue light radiance, blue light weighted radiance, and the blue light weighted radiance ratio. Therefore, it may determine whether a mobile item display device meets the low blue light display standards.

Requirements
1)Blue light hazard testing systems are subject to stringent regulations outlined in the standards.
2) An instrument for precise measurement with a strong optical dynamic in the less sensitive blue area.
3) Optimized for the geometry of measuring blue light hazards, this test adaptor ensures repeatable results.
4) International Standard IEC 62471 recommends measuring irradiation intensity with a carefully specified field of view as an alternate technique to direct spectral radiance measurement (the standard method). Calculating radiance from measured irradiance involves dividing by the solid angle.

Who benefits from our solution?
1) To ensure that their products comply with industry standards, lamp makers will conduct tests that evaluate the risks of blue light.
2) For those photometric labs interested in adding a photobiological safety measurement system to their repertoire of services:
3) For example, on-site risk assessments of industrial operations need optical radiation measurements that cannot be performed in a conventional laboratory setting.

What can you measure?
Spectroradiometric measurements and the determination of adequate amounts across a broad-spectrum range are required to accurately assess the photobiological dangers posed by the optical radiation produced by lamps, making this a challenging metrological task.
Measurements of irradiance, effective irradiance, and effective radiance are required during photobiological safety studies of lighting equipment to determine the full extent of potential risks to the eyes and skin.

Blue Light Hazard Measurement in the range of 300 – 700nm
LISUN has a tester that conforms to the EN62471-P standard for use in such a context. This well-calibrated equipment provides precise readings from 380 to 780 nm; the most hazardous range for blue light is 400 to 500 nm.
The EN62471-P blue light tester creates reports and calculates and displays data in easily digestible formats (charts/tables).

Recommendations on the assessment of blue light hazard
One of the most influential works on photobiological risks is the EN 62471 standard. The standard establishes criteria that should be used to evaluate the safety and potential risks to living organisms from both artificial and naturally occurring optical radiation sources. All optical radiation-generating sources, from ultraviolet to the far infrared, are included.
Injuries and even fatal infections might result from being near the emitting source. The biological tissues of the eyes and skin can be injured by exposure to UV, visible, or infrared radiation. UV rays often cause erythema, keratitis, and conjunctivitis. Cataracts, premature skin aging, and skin cancer are only some of the long-term effects of UV radiation on the eyes and skin.
Visible light and infrared radiation have the same effect on humans. Retinal damage may occur from visible light due to its thermal and photochemical pathways. High levels of infrared radiation over a short period may cause premature skin aging and damage the eyes’ outer layer (the cornea).
Therefore, the standard allows much leeway in measurement, ranging from 200 to 3000 nm. As a result, determining the level of photobiological risk involves several factors, making it a problematic metrological issue that calls for highly specialized, calibrated measuring equipment and the expert knowledge of trained laboratory staff. Assessment of risk requires precise and accurate measurements. Hence the instruments utilized must have high resolution.

Conclusion
Therefore, the LISUN has determined that general-use white light sources pose no risk from blue light. However, it should approach persistent exposures around the exposure limit with care.
However, it must take further precautions around sources that primarily produce blue light. Even though it does not go over the blue light danger level, children may experience discomfort while viewing the exhibit.
When incorporating these lights into kid-facing products, it’s important to stress the safety precautions it should take, even more so in violet-emitting light sources.
Blue light has been linked to macular degeneration in the absence of any concrete evidence linking the two.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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