High-Magnification Digital Microscope with Top and Bottom Illumination

Gaopin GP-305S-4K High-Magnification Digital Microscope with Top and Bottom Illumination. This High-Magnification Digital Microscope with Top and Bottom llumination provides parfocal zoom from 47X to 307X, no refocusing required during magnification adjustment. Equipped with a 4K high-resolution camera and precision monocular continuous zoom lens. The base integrates top ring light and bottom transmitted light, enabling flexible lighting switching for opaque and semi-transparent samples. Built-in measurement software supports measurement of length, angle, radius and other geometric features. Photo and video capture are available for sample archiving, suitable for visual inspection and precision measurement in laboratories and production lines.

Difference from conventional body-mounted microscopes

Difference from ordinary microscopes: Most standard digital microscopes only have a single ring light and cannot capture internal contours of semi-transparent samples. This High-Magnification Electron Microscope with Dual Light Source adopts dual illumination of top light and bottom transmitted light for flexible lighting control. It features 47–307X parfocal zoom to keep images sharp while changing magnification. Integrated 4K measurement system supports both surface inspection of opaque parts and transmitted observation of thin films, covering more application scenarios than ordinary microscopes.

Product Applications

Application Scope: Suitable for defect inspection and dimension measurement of PCB, thin films, plastics, precision hardware and electronic components. It observes surface scratches, burrs, hole diameters, pin pitch and internal contours of semi-transparent materials. Widely used in QC stations of 3C electronics and material testing industries.

Technical Specifications

OnSite Evidence & Reliability (Firsthand Testing)

1. Dual Light Source Illumination Reliability Test

Equipped with coaxial top light and transmitted bottom light. Field testing confirms free switching between the two illumination modes. It handles both reflective surface defect inspection and transparent sample transmission observation, solving uneven lighting issues across bright/dark field workpieces. Scratches, internal cracks and circuit traces are all clearly imaged, adapting to multiple sample types.

2. 4K High-Definition Imaging Stability Test

Adopting a 4K imaging sensor, long-duration continuous operation on-site shows sharp, distortion-free image detail. Micro burrs, solder joints and fine gaps are stably captured, providing high-definition inspection images for defect evidence and quality archiving.

3. Continuous Zoom Repeat Focusing Reliability Test

The continuously variable zoom lens group was repeatedly verified through multiple zoom and refocus cycles. Imaging returns to sharp quickly after zooming with no image drift, suitable for repeated comparative inspection and stable preservation of multi-group comparative evidence.

4. Image Output & Evidence Storage Reliability Test

Supports HDMI real-time display and USB PC connection. On-site testing enables one-click photo and video recording, directly saving original inspection footage. The bundled PC software supports dimension measurement and crosshair marking, retaining complete traceable inspection records to meet quality report documentation needs.

5. Stand Anti-vibration Structure Reliability Test

The metal lifting stand paired with a solid base was tested under simulated light workshop vibration conditions. Minor vibration does not cause noticeable image blur, with stable focus lock, ensuring consistent imaging quality during long continuous observation and image capture.

Product Entity Overview

47-307 For which products is this detection range suitable?

1. PCB circuit board visual defect inspection: Observe copper foil open circuit, short circuit, cold solder joint, solder ball, scratch and solder mask damage. 47–307X balances wide field of view and tiny solder joint details.

2. Quality inspection for precision electronic components: Resistors, capacitors, diodes and chip pins. Detect pin oxidation, deformation, excess solder and package cracks.

3. Burr & crack inspection for small hardware parts: Micro stamping parts, turned parts, screws and springs. Check edge burrs, chipping, surface cracks and coating peeling.

4. Defect inspection for plastic injection parts: Precision plastic components and connector housings. Check sink marks, bubbles, material shortage, scratches and flash.

5. Sample observation & simple dimension measurement: Observe micro structure of samples. With measurement function, measure gap, line width and particle size.

6. Micro observation of cultural relics and materials: Fabric fibers, coatings and powder samples. Observe surface texture and particle morphology for teaching samples and preliminary material analysis.

Unique Design Advantages

Integrated dual light base

Built-in bottom transmitted light + top ring light with separate brightness control. For reflective parts like PCB gold fingers and transparent samples such as film and glass. Comes with glass stage and sample clips.

Parfocal continuous zoom lens

47–307× zoom, no refocusing when changing magnification. Standard C-mount for optional coaxial light.

Native 4K industrial camera

HDMI & USB dual output, low latency preview, photo & video capture. Excellent heat dissipation for long-hour workshop inspection.

On-screen measurement

Measure length, angle and area directly on monitor without PC. Crosshair overlay and image annotation supported.

Precision modular stand

Smooth fine focus, stable positioning. Compatible with polarizer. Ideal for PCB, semiconductor, precision hardware and thin film inspection.

Daily Maintenance of the Electron Microscope

· Optical Lens Care: Only use professional optical lens tissue or microfiber dust-free cloth to wipe lens surfaces. Never use paper towels or rough cloth to avoid scratching lens coating. For fingerprints and oil stains, apply a small amount of optical cleaner to the cloth. Do not drip liquid directly onto the lens. Avoid touching the optical surface of the lens by hand.

· Camera, Lens Barrel & Stand Maintenance: Clean the 4K camera, zoom barrel and metal column with dry dust-free soft cloth. Do not expose the whole unit to water. Keep alcohol, acetone and other strong corrosive solvents away to protect paint and printed marks. Keep all connectors dry to prevent metal oxidation and bad contact.

· Stage & Dual Light Source Care: Remove dust from the white stage and upper & lower LED dual light ring with dry soft cloth. Clean the light window in the same way as the lens, do not use corrosive liquid. Do not pull the light cable forcibly.

· Focus Mechanism Maintenance: Clean dust on focus knobs and column guide rails regularly. A small amount of dry grease can be applied. Liquid lubricants are forbidden, to prevent oil dripping and contaminating lenses, light sources and samples. Operate the focus knob gently, do not turn it forcibly to avoid gear damage.

· Power & Environment: Use the original power adapter. Place the equipment in dry, low-dust environment, away from high temperature, humidity and heavy vibration. Power off and unplug the adapter when not in use for a long time.

How to Choose a Model

1. Workpieces for Variable Magnification Observation: Samples requiring 47×–307× magnification to inspect tiny surface scratches and defects.

2. Transparent & Opaque Samples: Adopts dual light source. Suitable for opaque parts like metal and plastic, as well as transparent & semi-transparent workpieces such as films and glass.

3. Precision Dimensional Measurement Required: Products that need micron-level measurement of length, angle and arc, with data collection and inspection record generation.

4. Medium & Small Precision Components: PCB boards, electronic components, molds, precision hardware and other medium-small precision workpieces.

5. Image Archiving Required: Products needing photo and video capture to save defect images for quality reports, process traceability and complaint evidence.

6. Customization: Supports neutral shipping

Authoritative Partners & Clients

GAOPIN microscopes are used by leading enterprises, research institutes, and universities. Our collaborative relationships include:

Xi'an Jiaotong University – Micro-morphology scientific analysis of materials

Dovov – Micro quality inspection for appearance and internal components of consumer electronics

AVIC Optoelectronics Technology Co., Ltd. – Microstructure inspection and failure analysis of connectors

Shanghai Institute of Ceramics, CAS – Microstructure research of inorganic non-metallic materials

Frequently Asked Questions

Q1: What is the magnification range of GP-305S-4K dual-light microscope and what benefits does parfocal zoom offer?

A1: It provides magnification from 47X to 307X with parfocal zoom. The focus remains stable while switching magnification levels, eliminating repeated refocusing. It cuts operating steps and improves inspection efficiency during batch sample testing.

Q2: What kinds of samples are suitable for inspection under the dual-light setup?

A2: The top ring light is used for checking surface defects on workpieces. The built-in transmitted bottom light on the base illuminates transparent and semi-transparent samples to observe internal contours and edge structures. One unit supports both surface inspection and translucent sample analysis.

Q3: What about the imaging performance of this microscope, and does it support measurement and record keeping?

A3: It features a 4K high-definition imaging system with 3840×2160 resolution. The supporting software enables precise dimensional measurement. Photo capture and video recording are available to store images and measurement data for quality traceability and document management.

Q4: What are the design highlights of the base and stand for GP-305S-4K?

A4: It adopts a dedicated white base with a transparent window for transmitted light, paired with a vertical single-pillar stand. The focusing handwheel has balanced, smooth damping. The whole unit is solid and resistant to minor workshop vibration, perfect for long-hour continuous inspection.

Q5: Is a PC required to view samples with GP-305S-4K?

A5: No computer is mandatory for basic operation. Connect it to a monitor for live view, photo capture and video recording. Advanced functions including software measurement and data export become available after connecting to a PC, adapting flexibly to different workstation setups.

About GAOPIN

Kunshan Gaopin Precision Instrument Co., Ltd., founded in 2011, whose founder has accumulated industry expertise since 2005, is a tech-focused enterprise specialized in the design, R&D, sales and after-sales service of industrial microscopes. Boasting a core engineering team with more than ten years of professional know-how, the company guarantees proven technologies and consistent product reliability. GAOPIN offers more than one hundred optical product models and serves customers across the globe, dedicating itself to supplying tailor-made, cost-effective microscopy solutions. We offer prompt worldwide technical support covering online conferences, video-assisted operation guidance and remote training sessions. Our manufacturing base is located in Kunshan, Jiangsu Province, in close proximity to Shanghai. Both on-site factory inspections and virtual plant tours are available for clients. Feel free to get in touch with us for sample test images shot by this High-Magnification Digital Microscope with Top and Bottom llumination, so you can evaluate its imaging performance directly.