Our patented adhesive-free bonding process, Hy-Per Bond™, overcomes issues such as beam distortion and performance degradation resulting from the outgassing of optical cement.

Luminosity function: Luminosity function describes the average spectral sensitivity of human visual perception of brightness. While not perfectly accurate in every case, it is a good representation of visual sensitivity of the human eye.

Illuminance: Illuminance is the total luminous flux on a unit of surface area. It is a measure of how much incident light illuminates the surface, weighted according to ability of humans to perceive the wavelengths of light. Illuminance is measured in lux or lumens per square meter.

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If you have any questions regarding light meters please don't hesitate to speak with one of our engineers by e-mailing us at sales@instrumart.com or calling 1-800-884-4967.

Light measurements, of course, are susceptible to a number of types or errors. Light at the point of measurement, for example, should be proportional to the cosine of the angle at which the light is incident. The design of many light meters, though, forces the light to enter the meter at the incorrect angle which can cause measurement errors of up to 25%. Some meters include a "cosine correction" feature which consists of a diffuser which is placed over the sensor and filter which corrects the angle of collection.

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Candela: The candela is a unit of light intensity. It includes light emitted from a source in a particular direction and weighted according to the luminosity function. A common candle emits light with an intensity of roughly one candela.

Single point diamond turning (SPDT) is the process of turning optical elements with a diamond-tipped cutting tool and is used for high-quality aspheric optical elements. We use Single Point Diamond Turning to produce ultra-precise infrared optical components such as infrared aspheric, diffractive, and spherical optics and gratings.

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Lighting comes in all shapes and sizes. From large industrial scale lighting to the tightly designed illumination of a museum piece. Lighting also has a wide variety of sources including incandescent, LED, fluorescent, and many other types. Overall, lighting accounts for about 17% of electricity usage in the United States. The potential for savings is enormous, especially for large facilities. As tempting as it might be to dim the lights to save money, workplace regulations require minimum lighting standards to provide safe working conditions.

Light meters are useful tools in building design and operation. They help inform lighting requirements prior to building commissioning and, once the building is inhabited, they allow routine auditing of lighting systems for energy efficiency and lighting performance making it easy and convenient to optimize light levels to reduce the energy burden of buildings and fulfilling compliance with OSHA regulations.

Our expertise in optical materials begins with the selection of the correct material to meet the requirements of customers.

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Welcome to our family of stores, your go-to source for a wide selection of commercial and industrial products in the flow control and automation sectors. Each store features a curated range of specialized industrial solutions, with many items designed to complement each other, ensuring you can find everything you need for your specific application. Explore the stores below to discover our extensive product offerings for your business needs.

Light meters are precise instruments designed to quantify the amount of light, both natural and artificial, to ensure optimal levels of lighting to reduce the energy burden of buildings while fulfilling compliance with OSHA regulations. Also referred to as lux meters, they are useful tools in building design and operation as they allow for routine efficiency audits.

Lux: The lux is a unit of light intensity. Measuring luminous flux per unit area, is it equal to one lumen per square meter.

Lumen: The lumen is a unit of total visible light (luminous flux)emitted by a source. A lumen includes light radiated in all directions. A light source that uniformly radiates one candela in all directions has a total luminous flux of 12.57 lumens.

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Luminous flux: Luminous flux is the measure of the perceived power of light. It is evaluated according to its ability to produce a visual sensation, thus favoring visible light over infrared or ultraviolet light. Often used as an objective measure of the "useable" light emitted from a source, it is measured in lumens.

To deliver high quality components and systems, it is critical to accurately measure and test processed optical components with high precision and accuracy.

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Understanding light intensity and, therefore, being more capable of accurately measuring it is much easier with the knowledge of a few important terms.

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Luminance: Luminance is the amount of light reflecting off a surface. Generally refers to brightness as the human perception of brightness is due to reflected light. Luminance is measured in candelas per square meter.

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Most industrial light meters utilize silicone photodiode sensors as the measuring element. Photodiodes are photovoltaic cells which generate a current proportional to light exposure. As photons of light strike the diode, electrons are created which flow towards the cathode creating a photocurrent. More photons striking the diode results in more total current. The current is converted to measurement units of light (lux, foot-candles, etc.) and displayed on a needle galvanometer or on an LCD screen.

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Foot-candle: The foot-candle is a unit of light intensity equal to the illuminance cast on a surface by a one-candela source one foot away. One foot-candle is equal to one lumen per square foot or approximately 10.764 lux

OVVO Optics eyewear is made of surgical steel and titanium composite. Combining high-quality, European craftsmanship, with modern, technical design.

The process of mechanical machining infrared optical components using lathes equipped with diamond-tipped tools enables us to manufacture crystal-based optical products with a greater degree of precision than otherwise possible with standard machining techniques.

The human eye also perceives wavelengths and colors of light differently. The human eye is more sensitive to yellow and green light than red or blue. We are also blind to certain wavelengths of light such as ultraviolet or infrared. For light meters to measure light in the way it is perceived by humans, special filters need to be incorporated into the meter to match the CIE photopic response (human eye response). As different sources of light have different color palates, they may be perceived differently by human eyes even though they are of equal illuminance. The spectral response filters correct for this phenomenon.

Light meters, commonly referred to as lux meters, are precise instruments designed to quantify the amount of light. Though both natural and artificial light, or the absence of it, is a natural part of our lives, being able to measure it is important for a number of reasons. Light affects the way we see the world. Too much light, however, can damage sensitive materials, cause sleep disruption, contribute to light pollution, and waste electricity and money. Too little light can harm plants, cause eye strain, conceal dangers from us, and affect mood. It's no wonder controlling light is so important.

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