Scientific Laboratory Instruments, Optics, and Photonics

When one employs an integrating sphere labsphere for measuring optical power, you remove all the hassles faced with direct coupling method. But one must not forget that there are certain things about the integrating sphere you must know. Read on to learn about those things… You must pay attention to the internal reflectance The internal surface of the sphere should be highly reflective and at a wavelength of light which is to be measured. This only will ascertain the right measurements. Old integrating spheres were made up of two hollow hemispheres. The inner surface is usually given a coat of material which reflects wavelength of interest and eventually diffuses the input light. Coating used is sensitive to environment changes such as atmospheric conditions: bases, acids and vacuum). The integrating sphere labsphere must be coated every year. Calibrate detector and weight together  The distinct feature of any sphere and detector is completely specific to ...

Out of all the ways to calibrate a balance or scale, using approved calibration weights from Mettler Toledo is considered the best. There are two methods to use it – internal calibration and external calibration.   A lot of people do not understand this. So, we have taken this onus on us. We will explain the difference between internal and external calibration is. So read on to know more… External calibration External calibration implies that it needs to be done on your own. For calibrating a balance externally, it is important to gain an access to a set of calibration weights that are approved and maintained in topmost condition. Firstly, weights are added on the scale or the balance. Their weight is set as the standard. For instance, if the weight to be measured is 500 grams, the weight should be set at 500 grams. One noteworthy thing here is that the weights must be brought from a trustworthy source. Maintain them with care so much so that they do not gain or l...

Halogen light source s have come a long way from a traditional light bulb to a high precision lamp. Halogen bulbs derive their name from the halogen gas filled inside the lamp casing which houses the tungsten filament. Here are the different types of halogen light sources used in spectrophotometry: Deuterium lamp It is also known as D2 lamp. The wavelength range varies from 190nm – 370nm. A normal glass exterior is not suitable due to its high temperature condition. Hence quartz or some other material is used. A deuterium lamp can live up to 1000 hours. A deuterium lamp is made with halogen lamps in an UV/VIS spectrophotometer. This will aid in canvassing the whole visible and UV light wavelength. Deuterium lamp is a good source of ultraviolet light for analytical instruments, liquid chromatography detectors, pollution analyzers, medical analyzers, densitometers, and colorimeters. They are well suited for secondary calibration standards in the UV region. Halog...

Integrating sphere is a device used to measure radiant flux. The flux is then carefully monitored either directly or when it comes in contact with a sample. One of the key applications of integrating sphere labsphere is measuring transmittance or reflectance through scattering or diffuse materials. There are more applications, learn about them below: Radiometer and photometer Integrating sphere labsphere when combined with a photodetector which is of the correct spectral response is utilized to calculate the gross geometric flux coming out of a light source. Flux density too of the illuminated areas can be calculated. It is the spectral properties of the light source which helps in deciding the right photodetection system. This is the first application. The Sphere Photometer By far the oldest of all the applications of integrating sphere is counting gross of geometric luminous flux from electric lamps. This method began towards the beginning of the 20 th...

You want a product that can cool as well as regulate the temperature via a compressor refrigerant of the medium. Then Kewlab’s lab mini chiller is just the right product for you. Need reasons. Here are a few: Let’s take a gander at its features first: 1.     Digital display – this feature ensures high level of performance. 2.    Working – Kewlab lab mini chiller has a strong refrigeration system in addition to an effectual pump circulation. The two combined together contribute towards its no hassle working ability. 3.    Long lasting - As the structure is compact, the unit and the machine are completely free of oxidation or pollution. 4.    No internal rusting – the chiller is manufactured with top quality steel. It is made thus that it can be joined to multiple joints or hoses or linked to a closed circuit. 5.    Reliable and functional - It has an in-built safety alarm device and maintains a constan...

LEDs are the first preference of fiber illumination sources. These have taken place of lasers and arc lamps. The latter two have too many adverse effects associated with them. This doesn’t happen with fiber-coupled LEDs. They have numerous applications in research, educational and scientific world. Why pick Kewlab Fiber coupled LED They are less expensive and are more trustworthy in terms of durability and longevity. Latest fiber coupled LEDs provide a higher level of intensity of light. One such example is >25mW blue light through a 200 micron fiber. Here are the other features of Kewlab LED you should have a look at. The Applications    Kewlab Fiber coupled LED can be utilized for •Transmission/Reflectivity measurement •Spectral analysis and absorption spectrum measurement •Color measurement •Spectral analysis and absorption spectrum measurement •Fluorescence measurement This doesn’t end here: Kewlab Fiber coupled LED has more to offer: It has ...

Collimating lenses are optical lenses that help in making the light entering into the spectrophotometer parallel. With a collimating lens from Thorlabs or elsewhere, one can control the field of view, spatial resolution of their setup, collection angles for sampling and illumination. Why are they important in the first place? One of the prime reasons for use of the collimating lens is high divergence result of a laser diode. It is made up of aspheric lenses, they do not pose spherical aberration. Collimating lenses are usually picked as and when a collimated beam requirement is between one and five millimetres. Where are they used and how are they used? Collimating lens is placed inside a collimator. An Optical collimator is utilized for calibration, testing and measurement. In one of the types of the collimator, patterns are projected into infinity. When a target is kept in the focal plane of a collimator, the uniform target seems extremely near. This phe...