Scientific Laboratory Instruments, Optics, and Photonics

A calibration is a quantitative comparison. To check the reading of the balance a known weight is kept on the pan. The difference in the measured value and the true value is defined as an error. After calibration of weight in the United States , a certificate is created that reports the balance or scales readings and their comparison with the reference value. Balance calibration and the need to calibrate A balanced and scale calibration is important to achieve accurate weighing results. Weighing with the non-calibrated scale is useless as it hinders the accuracy of balances and scales with time. This may be due to wear and tear that is caused by the regular use and some external factors. On the other hand, balance calibration if inspected regularly enhances the life of the balance or scale and its weighing accuracy. Benefits of balance calibration Calibration weight is done by an authorized provider in the United States offers the following benefits: ·   

Integrating sphere is a versatile optical element that has multiple Lambertian reflections at the inner surface. This reflection results in the homogenous distribution of optical radiation. The radiation source located in two locations; either inside the sphere or in front of the source’s entrance port. Properties of integrating sphere The irradiance of the integrating sphere labsphere is proportional to the total radiant power emitted either by the source inside the sphere or by the one located at the entrance port. The irradiance level does not depend on the geometrical and directional distribution of the primary source if direct illumination of the respective location is prevented. This property makes the instrument useful optical element for the detection of radiant power. The radiance reflected from the inner surface of the sphere and shielded from the direct illumination, is constant in its directional distribution and independent of the specific location wher

Halogen has been used as the light source for decades and is chosen as the source of illumination for varieties of imaging modalities. But now LEDs is gaining popularity in the marketplace and increasingly becoming a preferred choice for a light source in various optical instruments due to its many advantages. Before comparing the characteristics of both light source, have a look on the how halogen and LED lamps produces light. Halogen Lights Halogen light source is similar to incandescent bulbs. It consists of tungsten filament surrounded by quartz envelope filled with an inert gas that makes it preferable for the use in a microscope for bright field and phase contrast microscope. With the supply of electricity, tungsten begins to glow just as within the incandescent bulb. As tungsten glows it begins to evaporate, giving off tungsten atoms. This lowers the brightness of the lamp with time. The gas present inside the lamp reacts with the tungsten vapors and recoats it

Fused Silica is the highly pure, non-crystalline material and is the most preferable choice for making mirror substrate, high performance lens, and simple stable tool. It has many benefits that make it a priority choice among the users. Some of the benefits of Fused Silica are: Range of Transmission: A fused silica produces the high throughput over a wide range of the spectrum. A standard UV fused silica transmits more than 90% in the wavelength range of 200nm to 2 microns with the least deviation at 1.4-micron wavelength. The IR grade fused silica achieves more than 90% transmission within the wavelength of 200 nm to 3.5 microns. Other fused silica varieties allow the transmission in the high-power semiconductor, extreme UV region of 248 nm and 193 nm due to the presence of some impurities.  Fused Silica is the most superior and versatile glass material as its transmission range lies within the limit of most of the optical glasses. Low Thermal Expansion Coef

Most of the chemical reactions are need to be carried out in cold temperature and therefore lab water chiller plays an important role in the research laboratories, pharmaceutical industries, educational institutes etc. Chillers help in removing heat for a wide variety of processes. It is necessary to make a right choice as a proper and right chiller increases the production speed and accuracy, protects valuable process equipment, and reduces water consumption and related costs. On the other hand, choosing a wrong device or the chiller with the wrong size would not be able to meet the cooling requirement and may hinder with the whole process.   An ideal chiller is the one that has an adequate cooling capacity and that deliver the cooling fluid at the proper pressure and flow rate. Here are a few characteristics that needed to be considered while choosing a lab water chiller . Heat load: While purchasing the chiller for your laboratory it is essential to determine the heat loa

A biological microscope is an optical microscope that is used to study microscopic organisms, cells, tissues and their vital processes. The magnification range of the microscope varies and depends on the objective lens attached to it. The objective lens is available in the range from 10x to 1000x. Some specialized version of biological microscopes is capable of performing fluorescence imaging and is commonly known as fluorescence microscopes. Kewlab deals in different types of the biological microscope and avails the product at an affordable price. Types of Biological Microscopes There are different types of biological microscope like a compound microscope, inverted microscope, and fluorescent microscope. These microscopes are used for different purpose and in different applications. Compound Microscope: A compound microscope is an extension of the magnifying glass that uses two or more lenses to produce the clear and enlarged image of an object. It magnifies an

It is often required to transform light output from an optical fiber into a free-space collimated beam. Although to carry out this task, a simple collimation lens is sufficient, but it is necessary to fix the fiber end firmly at one end at the fixed distance from the lens. To fix the fiber at one end, fiber collimator is used. It is placed at the distance approximately equal to the focal length of the lens. Fiber Collimator is a passive device that combines the fiber and lens for collimating the light that is coming from the fiber, or for launching collimated light into the fiber. Features of Fiber Collimator ·          Fiber Collimator is made from a curved mirror or Collimating lens Thorlabs . ·          The light source in fiber collimator is placed at its focus that makes divergent light into a parallel beam or couple the parallel beam into the fiber. ·          It is available at a different wavelength ranging from 850 nm to 1500 nm. ·         It can

The laser is amazing light beams that are powerful enough to zoom miles into the sky or cut the lumps of metal. Nowadays the lasers are found in a dazzling range of products and technologies, including CD and DVD players, metal-cutting machines, measuring systems, laser printers, barcode scanners, in the eye and cosmetic surgery. Even our clothes are cut with lasers; we send and receive emails over the internet with the signals that lasers fire down fiber-optic cables. The wide application of laser has results in the manufacture of laser crystal product that are used in optics study. How is laser created? The laser beam is created when the electrons in atoms in special glasses, crystals, or gases absorb energy from an electrical current or another laser and jump to higher energy orbit on excitation. When the excited electrons return back to their ground state they emit energy in the form of photons (particles of light). Unlike normal light, the photons of laser light hav

Water baths and chiller plays a very important role in the laboratory of pharmaceutical companies, biotech companies, research institutes etc. But most often it is placed at one corner of the lab and is not taken care of. Since lab water chiller and bath plays an important role in various laboratory tasks therefore it is essential to maintain its proper functioning. Whenever a task involving heating and cooling of chemicals is to be done in the lab, the role of water bath and chiller comes into play. A proper maintenance of water bath and chiller is very important as a small error in the unit can result in loss of thousands of dollars. How often should you check the functioning of the equipment? A cleaning and maintaining of water chiller and bath employs little efforts and energy. Cleaning of air, fluid or condenser of the water bath is found to be enough to maintain its proper functioning. •             Fitters and water level must be inspected weekly. During th

It is often required to transform light output from an optical fiber into a free-space collimated beam. Although to carry out this task, a simple collimation lens is sufficient, but it is necessary to fix the fiber end firmly at one end at the fixed distance from the lens. To fix the fiber at one end, fiber collimator is used. It is placed at the distance approximately equal to the focal length of the lens. Fiber Collimator is a passive device that combines the fiber and lens for collimating the light that is coming from the fiber, or for launching collimated light into the fiber. Features of Fiber Collimator ·      Fiber Collimator is made from a curved mirror or Collimating lens Thorlabs . ·      The light source in fiber collimator is placed at its focus that makes divergent light into a parallel beam or couple the parallel beam into the fiber. ·          It is available at a different wavelength ranging from 850 nm to 1500 nm. ·          It can eithe