There are a number of essential considerations when choosing the glazing for a greenhouse. First and foremost, every entrepreneur wants the glass to enable the optimal yield at the lowest possible costs. Additionally, factors such as light transmission, UV transmission and the insulation value are important criteria in this decision. The choice of greenhouse roof also has an impact on the level of diseases due to pests, fungi and viruses.

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Diffuse glass is transmits slightly less light than regular glass (by a few percent), therefore it is advisable to apply an AR coating to compensate.

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Safety glassThe standard glass used in greenhouses has a thickness of 4.0mm and a light transmission of approximately 90%. Safety glass or tempered glass is used in most cases. This type of glass is between four and seven times stronger than normal glass.Diffuse glassDepending on the region in which the greenhouse will be installed, it can be worthwhile to use diffuse glass. Diffuse glass affects the natural light in the greenhouse.

A high power or compound microscope achieves higher levels of magnification than a stereo or low power microscope. It is used to view smaller specimens such as cell structures which cannot be seen at lower levels of magnification. Essentially, a compound microscope consists of structural and optical components. However, within these two basic systems, there are some essential components that every microscopist should know and understand. These key microscope parts are illustrated and explained below.

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Dissection Microscope Resolution: Just like in a compound microscope, the wavelength of light limits resolution. This microscope does not use light to see ...

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It ‘scatters’ direct sunlight, enabling it to penetrate deeper into the interior and in between the plants. By diffusing the sunlight that is present in the greenhouse on fine days, it is possible to gain more benefit from natural light. This boosts the harvestable yield and also improves the quality of the end product.

Eyepiece or Ocular is what you look through at the top of the microscope. Typically, standard eyepieces have a magnifying power of 10x. Optional eyepieces of varying powers are available, typically from 5x-30x.

Eyepiece Tube holds the eyepieces in place above the objective lens. Binocular microscope heads typically incorporate a diopter adjustment ring that allows for the possible inconsistencies of our eyesight in one or both eyes. The monocular (single eye usage) microscope does not need a diopter. Binocular microscopes also swivel (Interpupillary Adjustment) to allow for different distances between the eyes of different individuals.

Iris Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage. Most high quality microscopes include an Abbe condenser with an iris diaphragm. Combined, they control both the focus and quantity of light applied to the specimen.

Nosepiece houses the objectives. The objectives are exposed and are mounted on a rotating turret so that different objectives can be conveniently selected. Standard objectives include 4x, 10x, 40x and 100x although different power objectives are available.

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Coarse and Fine Focus knobs are used to focus the microscope. Increasingly, they are coaxial knobs - that is to say they are built on the same axis with the fine focus knob on the outside. Coaxial focus knobs are more convenient since the viewer does not have to grope for a different knob.

Condenser is used to collect and focus the light from the illuminator on to the specimen. It is located under the stage often in conjunction with an iris diaphragm.

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Illuminator is the light source for a microscope, typically located in the base of the microscope. Most light microscopes use low voltage, halogen bulbs with continuous variable lighting control located within the base.

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Stage is where the specimen to be viewed is placed. A mechanical stage is used when working at higher magnifications where delicate movements of the specimen slide are required.

Stage Clips are used when there is no mechanical stage. The viewer is required to move the slide manually to view different sections of the specimen.

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Achromatic definition: free from color.. See examples of ACHROMATIC used in a sentence.

Objective Lenses are the primary optical lenses on a microscope. They range from 4x-100x and typically, include, three, four or five on lens on most microscopes. Objectives can be forward or rear-facing.

A single convex lens mounted in a frame with a handle or stand is a magnifying glass ; Lenses are used as prosthetics ; Other uses are in imaging systems such as ...