Founded in 1995, Mifeng Sealing Products Co.,Ltd. is a professional China iris diaphragm manufacturer and designer specializing in a diverse range of fiberglass products, seal components and packing for automobiles, motorcycles, machineries and home electric appliances. With ISO9001: 2000 approval, we have a strong team of experienced designers and production technicians. Our products have gained the certificates of ISO/PAS17712 report, US ABS group report and US customs approval. We also provide OEM iris diaphragms with origin production of some famous brands such as B+S, NOK, TTO, VALQUA and DZ. Also as a sale, we produce various accessories made of NR, NBR, EPDM and etc.

A circular device with a variable diameter, commonly used on cameras to regulate the amount of light admitted to a lens. ThesaurusLegend: Synonyms Related Words Antonyms. Noun 1. iris diaphragm - diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening. An iris diaphragm is constructed of a number of interconnected "leaves" that, when adjusted with a simple lever, open and close much like the pupil in your eye. The beauty of such a device on a microscope is that it gives you almost an infinite number of settings. You are not limited to six or eight like you would be with the disk diaphragm. Additionally, the iris diaphragm is much easier to adjust while using the scope. You can watch the changes in lighting take place while you peer through the lens. With the disk diaphragm, the lens goes black between settings…leaving you in the dark! The eyepiece is locked-in to prevent classroom tampering.Head: Monocular or dual inclined teaching head. Viewing bodies are inclined 45° and rotatable 360°.Stand: Full size stand with separate coarse and fine adjustment controls set in ergonomic, low positions for comfortable use.

A good microscope is an investment in learning and adventure. An iris diaphragm is a good investment that will pay for itself over and again in many situations. If an ad you are looking at does not specify "iris" diaphragm, it probably has a disk type. The iris diaphragm is superior, and it will allow you to see things that simply cannot be seen with the disk diaphragm. Using the iris in my Observer I can easily see the internal organelles of the single-celled protozoa I find in a nearby swamp. (Oh joy!) All GreatScopes from the Observer III and up feature the preferred iris diaphragm as standard equipment. The Observer IIdf has a disk diaphragm. Cast alloy aluminum stand with an acid resistant lustrous almond finish.Nosepiece: Rear facing, triple (BR3088F) or quadruple (BR3089F) revolving, ball-bearing nosepiece with positive click stops to ensure parcentration.Objectives: DIN standard achromat, parfocal, parcenter and color-coded. All models include 4x (N.A. 0.10), 10x (N.A. 0.25) and 40x R* (N.A. 0.65). A 100x R* (N.A. 1.25) objective is also supplied with the BR3089F. *Retractable Spring MountStage: 119 mm x 119 mm with stage clips or factory installed double-plate mechanical stage with low position controls and iris diaphragm.Substage: BR3088F models offer a built-in N.A. 0.65 condenser with five aperture disc or iris diaphragm.

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