microscope focus rack block focusing mount

Focusing holders hold the microscope body and contain the mechanism that raises or lowers the body to focus on the specimen. Complete stands include their own focusing holders. But for other kinds of tasks, however, it may be necessary to mount the microscope body on a boom arm stand or directly onto a machine or some other surface. The focusing holders below offer a range of options for such applications.

coarse and fine focus rack block

Coarse and Fine Focus Block/Holder focus holder with coaxial coarse and fine focus for high magnification applications where precise fine focus adjustment is required. Rack and pinion mount allows smooth, precise focusing over 33mm of travel. Coarse and fine focus mechanism incorporates a slip clutch and tension adjustment.
Focusing holders hold the microscope body and contain the mechanism that raises or lowers the body to focus on the specimen. Complete stands include their own focusing holders. But for other kinds of tasks, however, it may be necessary to mount the microscope body on a boom arm stand or directly onto a machine or some other surface. The focusing holders below offer a range of options for such applications.

coarse focus and fine focus adjustment focusing knob

Coarse vs Fine Adjustment

difference between coarse and fine adjustment is the range that they have. The coarse adjustment covers the entire range from minimum to maximum. In contrast, the fine adjustment only covers a fraction of the entire range. The bare minimum range for the fine adjustment is the discrete step increment of the coarse adjustment, in order to cover the entire range. It can also be larger, depending on the designer of the device.
1.Coarse adjustment has steps in large increments while fine adjustment has steps in much smaller increments
2.Coarse adjustment covers the entire range while fine adjustment only covers a fraction of the entire range

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magnifying lamp allows the light to shine on the object you are working on,
as well as make the object bigger so you can see the little details

Industrial Magnifying Lamp with Articulating arm LED light source 12W
127 mm magnifier diameter with harmonious LED ring lighting,crystal glass lens (incl. protective cap) with 3 diopters magnification,articulated arm with integrated cable guide and 700 mm working radius,magnifier head tilts 90° and swivels 360°,clamp base for table thicknesses up to 60 mm, Optional Mount: Clamp, table base, floor stand, wall bracket, etc
Available for inspection on electronic circuit board, laboratory inspection, it is Perfect Magnifying Lamp for Work or Hobbies
this lamp boasts 5 inch diameter lens that will bring hard to see details into clear, sharp focus.
Magnifier and lamp combination,On/off switch

Suitable for domestic, industrial, medical and professional use.
The lenses coated optics to provide exceptionally high, crisp and bright image quality.
Fixed lens or Interchangeable Lens
lens can be changed replaced,if necessary without wastng the whole magnifier

magnifyier lamp with base clamp/floor/table

Magnifier lamp main Featrues:
Magnification 3D5D8D diopter
lens diameter 5inch 127mm
with/without dust cover
brightness adjustable or none
body color white or black
Base desk clamp or floor type

magnification 3 diopter/5 diopter

Most of them have a dioptre number of 3 or 5 and depending on the lens the magnifier.Another important aspect you should consider is the size of the magnifier. Different lamps are offering different stages of magnifying, and the choice depends on the detail of the work as well as the size of it.

magifiying lamp lens diameter 5inch 6inch 7inch avaliable

The lens head can rotate left and right with 360 degrees and flip up and down 180 degrees
Soft cool bulb for natural color and shadow-free magnification
Power on and off switch
Articulated arm ,no visible springs, Hydraulic look
Conveniently adjustable height and arm for magnification in any position
The dimmable dimmer allows you to easily adjust the brightness level to achieve the perfect lighting for drawing, reading, arts & crafts, sewing, needlework, working, and studying.
Available body color in Black and White.

Magnifying lamp application

1 suitable for circuit board inspection, processing, installation at electronics industry. Electronic engineers to observe and test the micro elements, components of dense circuit board
2 suitable for engraving, fine operation and observation.
3 suitable for simple surgical operation. Enlarge the lighting for beautician and medical staff
4. circuit board test, stamp collector, infirmary, beauty parlor, reader, amateur, engineer.

By chutongelec

Ring led light microscope illumination
as lightsource of microscope to keep objective products observed, such as electronic component,machine vision,laboratory observation

ring led light description
Bright white LED bulb ring light for microscopes. The light includes led ring light with (60mm, 70mm,80mm,100mm) inner diameter, 110-240v power adapter. With variable intensity intense and focused shadow-free illumination for stereo microscopes. high luminance and brightness adjustable, special design for stereo microscopes .Have proper in-line configuration, user can install the polariscope when needing. Reduce the ray interfere and enhance the image quality

colorful lightness ring led light

Blue lightness 460nm wave length

Green lightness 520nm wave length

Yellow lightness 590nm wave length

Red lightness 620nm wave length

UV lightness ultraviolet 365nm 395nm

Ring led light instrument lighting application:
– microscope illumination illuminator
– Measuring and observing and testing instruments
– Viewing and observing instruments and accessories
– medical ecological photography lighting,machine vision
-Laboratory and Measuring and Observing and Testing Equipment

Microscope led light source Specific advantages
1, LED lights for pure DC power supply, no stroboscopic, not easy to cause eye fatigue, nor to the working area other devices (such as oscilloscope) produce harmonic interference.
2, uniform illumination of LED shadowless lamp for observed objects, no shadow, high definition.
3, long life: LED shadowless lamp because of low calorific value (no heat radiation), power consumption small (low voltage, low current start) the average life expectancy of more than 35000 hours, far greater than circular energy saving lamp 1500-2500 hours, life is more than ten times of that of an energy-saving lamps.
4, eliminate hidden dangers: most of the annular lamp operating voltage for AC 110V or 220V AC, using burnt by improper power supply and the lamp tube phenomenon not uncommon due to, led shadowless lamp use broadband 100- 240V AC switching power supply.
5, safety and environmental protection: a ring fluorescent lamp than the shock resistance, impact resistance is not easy to break, waste recycling, no mercury pollution, is the real environmental protection products.
6, adjustable brightness: with special brightness controller (no need to purchase the other) operator can be freely adjusted according to their adaptability to the luminance brightness, so as to achieve the most ideal comfort, the eyes of work for a long time is not easy to produce fatigue.
7, microscope LED light with inner diameter 60mm70mm80mm, to matching various microscope bodies in different sizes

Application and purpose of stereo microscope
Stereo microscope is a microscope with two complete optical paths. It has stereoscopic sense when observing specimens. It has many uses. Stereoscopic microscope is a microscope with stereoscopic sense. Stereo microscopes can be equipped with a digital micro imaging device and a digital stereoscopic microscope. In this way, we have more advantages in observation.

Advantage of stereo microscope:
Make eye comfortable and achieve multi person synchronous preview
functions of video, measurement.
save the observed pictures and share.

Stereo microscope,The magnification change of stereo microscope is obtained by the change of the distance between the middle lens group, therefore, it is also called “the continuous zoom stereo microscope” (zoom stereo microscope )
Stereo microscope, also known as “dissecting microscope” , is a kind of three-dimensional visual instrument, which is widely used in biology, medicine, agriculture, forestry, industry and marine biology departments.
Stereo microscope operation is simple, the magnification is generally in the 7X-42X, the maximum magnification of 180X. Stereo microscope is the most widely used.

Application field of stereo microscope as follows:
1.Study on the animal science, botany, entomology, histology, mineralogy, geology, archaeology and dermatology.
2 in the textile industry, for the inspection of raw materials and cotton fabric.
3 in the electronics industry, as a transistor spot welding, inspection, etc..
4 various kinds of materials, such as the cracks of the cracks, the corrosion of the surface and other surface phenomena.
5 in the manufacture of small precision parts, used for machine tool equipment, working process observation, precision parts inspection and assembly tools.
6 lens, prism or other transparent material surface quality, as well as the precision of the scale of the examination.
7 identify cions is true or false .
8 widely used in textile products, chemical, chemical, plastic products, electronic manufacturing, machinery manufacturing, pharmaceutical manufacturing, food processing, printing industry, higher education institutions, archaeological research and many other fields.

Zoom stereo microscope Wide range of Applicable industries and fields
During the maintenance process, check the fly line, cable, components, tin column welding and so on.
As research and dissection tools in zoology, botany, entomology, histology, mineralogy, archaeology, geology, etc., agricultural selection
Inspection, assembly and repair of small precision parts such as instruments, meters and electronics industries.
Check raw materials and cotton wool fabrics in textile industry such as cloth, silk, dust-free cloth and so on.
Inlays and identification of jewelry, gemstones, jewelry, etc.
Check the surface of various materials such as crack formation, stomatal shape and corrosion.
A device used as a machine tool for making small precision parts, for observing working processes, for inspecting precision parts, and for assembling work.
Identification and appreciation of the authenticity of documents, stamps and banknotes.
Micro carving technology for small articles such as stone, jade, handicraft and so on.

The dispersive spectrum of visible light is red, orange, yellow, green, cyan, blue and violet in turn. The corresponding wavelength (frequency) is listed in the following table. It is necessary for students studying optics to remember the correspondence between visible light color and wavelength.

color wave length 











wordpress Shortcodes
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woocommerce shortcodes

WooCommerce comes with several shortcodes that can be used to insert content inside posts and pages.

Microscope structure component

The three basic, structural components of a compound microscope are the head, base and arm.

Head/Body houses the optical parts in the upper part of the microscope

Base of the microscope supports the microscope and houses the illuminator

Arm connects to the base and supports the microscope head. It is also used to carry the microscope.

When carrying a compound microscope always take care to lift it by both the arm and base, simultaneously.

Microscope accessories and spare parts function

There are two optical systems in a compound microscope: Eyepiece Lenses and Objective Lenses:

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.

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.

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.

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.


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.

Aperture is the hole in the stage through which the base (transmitted) light reaches the stage.

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.

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.

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.

Condenser Focus Knob moves the condenser up or down to control the lighting focus on the specimen.

microscope accessories and spare parts

ESD (Electro-Static discharge) means “electrostatic discharge”. ESD is a discipline formed in the middle of twentieth Century to study the generation, harm and electrostatic protection of static electricity. Therefore, the international custom used for electrostatic protection equipment collectively referred to as ESD, the Chinese name is electrostatic impedance device.



ESD20.20 standard

ANSI/ESD S20.20:2007 is an accredited certification project officially launched by the ESD Association (ESD Association) in 2000. The association is made up of manufacturers and operators of electronic components. The main members include IBM, MOTOROLA and other companies. The OEM factories or suppliers of these companies must be approved by ESD S20.20 certification. In order to obtain and maintain the qualification of OEM and supply products. Therefore, ESD20.20 can be considered as a buyer certification standard. For manufacturers of chips, electronic components, power supplies, converters, and display screens, ESD20.20 is similar to a mandatory certification standard to become a well-known brand supplier.

Sitemap of

Ningbo Chutong Electic Co Limited

Address: 1C1, No.237 Hongtang Middle Road,Jiangbei District,Ningbo 315000,China
Tel: 0086 574 87526982 Attn: James Hong

Key product:

microscope accessories, microscope spare parts, intrument and parts

microscope stand,focus mount, magnifying lamp,ring led light,eyepiece,reticle graticule,spare parts, accessories




Eyepiece reticle stage graticule

eyepiece reticle/graticule patterns of Chutong in sizes to fit all microscopes and magnifiers,if you need any special size for your eyepiece,please send us the picture or drawing of eyepiece, then we design the reticle graticule suitable for you.

Eyepiece graticules

include scales for measuring linear dimensions, circles for estimating diameters and radii, and a protractor for angles. Scales can be calibrated by comparison with a stage graticule, supplied in convenient microscope slide format.

there is also another type reticle for objective,Stage graticules (also known as stage micrometers), supplied in a convenient microscope slide format, are used to calibrate microscope eyepiece graticules. Eyepiece graticules give a reasonably accurate gauge of viewed object sizes, but, owing to differences in the optical systems of different objectives and eyepieces, calibration is needed for accurate work. This is simply done by placing the stage graticule on the microscope stage and viewing it through the microscope. Comparision of the eyepiece graticule with the stage graticule enables either a correction factor to be calculated or, perhaps, in bespoke systems, the optical spacing to be adjusted to eliminate the magnification error.


Stage graticule reticle
cross reticle x y axis of eyepiece

Difference between digital microscope and stereo microscope
difference between a stereo microscope and a digital microscope is the magnification. With a stereo microscope the magnification is found by multiplying the lens magnification by the eyepiece magnification. Since the digital microscope does not have an eyepiece, the magnification cannot be found using this method. Instead the magnification for a digital microscope is found by how many times larger the sample is reproduced on the monitor. Therefore, the magnification will depend on the size of the monitor. The average digital microscope system, which has a 15″ monitor, would result in an average difference in magnification between an optical microscope and a digital microscope of about 40%. Thus the magnification number of a stereo microscope is usually 40% less than the magnification number of a digital microscope.[citation needed]

Since the digital microscope has the image projected directly on to the CCD camera, it is possible to have higher quality recorded images than with a stereo microscope. With the stereo microscope, the lenses are made for the optics of the eye. Attaching a CCD camera to a stereo microscope will result in an image that has compromises made for the eyepiece. Although the monitor image and recorded image may be of higher quality with the digital microscope, the application of the microscope may dictate which microscope is preferred.[citation needed]

digital microscope USB interface connect computer
Digital microscopy has created a serious competition in the microscope industry. A digital microscope, to begin, is a slight variation of the initial optical microscopes. It uses optics and digital cameras to provide output. It has its own inbuilt LED that acts as a source of light. It differs from the optical microscopes in that images cannot be observed directly through an eyepiece. With these models, images are projected onto a monitor.
USB 2.0 digital microscope is an all-around microscope that can be of use to kids, hobbyists, and professionals. Certainly, anyone exploring the microscopic world can find this instrument beneficial.
CMOS sensor HD high definition
With an advanced CMOS sensor that is responsible for its 1600×1200 high definition resolution. Besides this, its 8-LED adjustable lights ensure that clarity of the specimen is undoubtable. The other essential feature of this scope is the USB cable that facilitates the microscope pen connection to the PC. All these are aimed at achieving a better viewing experience. Its intuitive software facilitates compatibility with windows XP, windows 7, windows Vista, windows 8 and 10.

digital camera that allows you to take pictures and record videos of observed samples. This model can be applied in many different areas: in electronics, jewelry, biology, zoology, and more.

Microscope is connected to personal computer or laptop via standard USB 2.0 cable. Observation of samples and editing of captured images are done through the easy-to-use image processing software that is included in the kit. This software has an intuitive interface: on the main toolbar are buttons for editing images and videos, printing images, saving projects to your hard drive and many other functions. The program also features measurement and calibration functions, allowing you to determine the length, perimeter, radius or diameter of observed samples, and measure different angles.

digital microscope combined optic digital camera and computer

digital microscope is a variation of a traditional optical microscope that uses optics and a digital camera to output an image to a monitor, sometimes by means of software running on a computer. A digital microscope often has its own in-built LED light source, and differs from an optical microscope in that there is no provision to observe the sample directly through an eyepiece. Since the image is focussed on the digital circuit the entire system is designed for the monitor image. The optics for the human eye are omitted.

Summery: optic and digital camera combined with computer

Digital microscopes are commonly low price commercial microscopes designed for use with a computer, although advanced systems that do not require a separate computer