0.7X~4.5X Objective; 3 Modes Illuminations; Ellipse base 320° Rotatable Base
Tags: Stereo MicroscopesGemological MicroscopesGemological EquipmentGem Clips
VGM740A is a professional trinocular gemological microscope which adopts excellent optical system with clarity image, 3D effect and large continuous zoom, and it is suitable for operators with different height because of its 0°~320° rotatable arm. Its high zoom ratio is 1:6.4, high brightness LED light source and dark field illuminator, could be used in jewelry identification to observe the intrinsic and surface characteristics of the sample and is invisible to the naked eye.
It is an indispensable gem identification instrument for the identification of synthetic products, optimized treatments and artifacts. It also has extremely important applications in diamond grading, such as observing clarity characteristics, observing and evaluating the color grade of diamonds. The joint of the lamp is easy to adjust the illuminator angle, and the focusing movement is 110mm for observing the gem and jewelry with different sizes. The steel gem clip has moderate firm and reduce the light blocking the waist of the gem, which make an all-round observation. The mounting holes of the gem clips both sides of the table provide the adjustment of eye point and angle. Reasonable illumination configuration will provide comfortable and easy operation. We also provide the accessory gem clips, steel wire clip and flat clamp for operators. The crystal characteristics of the inner and outer structure of the gem will be better observed by the polarizer. This microscope is widely used in jewelry appraisal institutions and college/ university.
Different Views of VGM740A Gem Microscope
Structure of VGM740A
Operation of VGM740A
Illuminations of VGM740A
VGM740A with its Connected Different Cameras
Specification for VGM740A: | |
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Eyepiece | High eye point WF10X(Φ20mm) adjustable diopter (micrometer can be installed) |
Objective | 0.7X-4.5X Ratio: 1:6.4 |
Total Mag. | 7X/45X (Optional: 0.5X,2X Aux.) |
3.5X-180X (Optional: 20X Eyepiece) | |
Head | Trinocular, 45°inclined, 360°Rotatable, Diopter adjustment: ±5 diopters |
Interpupillary distance | 55-77mm |
Working Distance | 100mm |
Focusing System | Focusing Range: 110mm, can observe different sizes of precious gems and samples |
Illumination | Three modes: bright field, dark field and top light: 20W super bright adjustable halogen light, Φ3-44mm continuous adjustable diaphragm. 9W daylight top lamp, color temperature meets the requirement of diamond grading lighting. LED Side Spot Light Source. 100V-240V wide voltage power, stable brightness |
Arm | can be tilted 0-38°, so that the height and angle of the observation point can be adjusted |
Stand Base | Ellipse base, 320° rotatable |
Gem clips | Humanization design steel clip, can reduce the light block of the waist of the gem |
Working Stage | Mounting holes for clips on both side of the stage, suitable for operators’ different habits |
Optional Accessories for VGM740A: | |
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Eyepiece | WF15X(Φ15mm), WF20X(Φ12mm) |
Auxiliary Objective | 0.5X, 2X |
Micrometer Eyepiece | WF10X(Φ22mm) |
Electronic eyepiece | 3MP,5MP,9MP,14MP (imaging with leaflets, timing, continuous acquisition of images, display scale, measurement and other functions; Many other output methods: multi-media, print, e-mail) |
DSLR digital camera | Canon, Nikon, Leica and other camera with over 10MP (photo, video and other functions) |
Identified the surface characteristics of the sample: gem’s growth striation, etch figure, scratch, damage, symmetry, split surface (bubble, gloss difference) etc.
Observe the intrinsic characteristics of the sample: inclusions’ type, shape and quantity, double crystal surface, growth striation, color distribution characteristics, initial cleavage, defect etc.
Observe the doubling of facet edge: the doubling of facet edge of the gems with high birefringence, such as zircon (DR=0.059), olivine (DR=0.036) and tourmaline (DR=0.078).
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