I. Product Overview
The SZN‑series consists of Greenough‑type continuous‑zoom stereo microscopes, with the SZN71 as one of its core models. It delivers a zoom range of 0.67‑4.5× and a zoom ratio of 6.7:1. When fitted with eyepieces and auxiliary objectives, the overall magnification can reach 2×‑180×, enabling seamless optical switching from low‑power panoramic viewing to high‑power detailed inspection.A 10‑degree stereo convergence angle and flat‑field wide‑angle eyepieces ensure flat‑field imagery under large depth‑of‑field conditions. Its 45° inclined viewing head adopts an ergonomic design to accommodate varied operating postures.Thanks to its compact and user‑friendly structure, sharp three‑dimensional images and flexible component combinations, this microscope meets high‑precision requirements and is widely deployed for research and inspection within the electronics industry, biomedicine, scientific research, education and other technology‑intensive industrial sectors.
II. Equipment Specifications
| 类别 | 参数详情 |
|---|
| 观察头 | 45° 倾斜，瞳距 52-76mm，双边视度调节（±5），双目 / 三目 / 数码可选，三目分光比 20%/80% |
| 目镜 | PL10X/22mm、PL15X/16mm、PL20X/12.5mm 等高眼点平场目镜，视度可调 |
| 变倍物镜 | 0.67-4.5X 连续变倍，工作距离 110mm，带定格定倍与倍率限位功能，主要倍率刻度指示 0.67X、0.8X 等 |
| 辅助物镜 | 0.5X（工作距离 177mm）、0.7X（116mm）、1.5X、2X 等，扩展倍率范围 |
| 调焦机构 | 立臂式粗微调同轴调焦，行程 50mm，张力可调并锁定，微调精度 0.002mm |
| 照明系统 | LED 或卤素灯，亮度可调，适配多样品照明需求 |
| 总放大倍率 | 2X-180X（搭配不同目镜与辅助物镜） |
| 工作距离 | 110mm（标配），搭配辅助物镜可达 280mm 左右 |
III. Functional Features
Precise Magnification Preset: Major magnification positions support accurate repetitive positioning to facilitate magnification calculation during observation. Dual‑sided zoom handwheels deliver light‑touch operation and relieve fatigue from prolonged handling.
Excellent Optical Performance: Adopting the Greenough optical system paired with wide‑field flat‑field eyepieces and a 10° stereo convergence angle, the microscope ensures flat‑field, sharp and bright images at a large depth of field.
Ergonomic Design: The 45° inclined viewing head features adjustable interpupillary distance ranging from 52‑76 mm and dual‑side dioptre adjustment. Twin zoom handwheels bring convenient and comfortable manipulation.
Flexible Magnification Expansion: It provides continuous zoom from 0.67‑4.5×. Auxiliary objectives of 0.5X/0.7X/1.5X/2X can be installed to extend the overall magnification for varied observation requirements.
Stable Focusing and Illumination: The upright‑arm coaxial coarse‑fine focusing mechanism comes with a 50‑mm travel range, adjustable friction and locking function. Adjustable‑brightness LED or halogen lighting accommodates illumination demands of multiple specimen types.
Diversified Viewing‑head Options: Binocular, trinocular and digital viewing heads are available. The trinocular head adopts a 20%/80% light‑splitting ratio. The digital version supports high‑definition real‑time Wi‑Fi output and preview on multiple terminals.
IV. Application Scenarios and Fields
Electronics Industry: PCB‑SMT solder spot inspection, LCD & IC assembly and testing, cellphone motherboard maintenance, pin trimming for electronic components
Biomedicine: Small‑animal dissection, nerve anatomy, embryo manipulation, cell‑culture observation, histological analysis
Research & Education: University biology and material‑science teaching demonstrations, microstructure study of cultural relics, geological mineral inspection
Industrial Fabrication: Precision component assembly, micro‑structure visual inspection, mould wear detection, tiny‑defect inspection for auto components
Antique Identification: Micro‑feature identification of paintings, ancient coins and stamps to verify authenticity and era
Other Industries: Textile raw material inspection, food‑processing quality control, fine print inspection and jewellery micro‑defect detection
V. Technical Advantages
Unique Optical System: Equipped with the Greenough optical system and wide‑field flat‑field eyepieces, it features a 10° stereo convergence angle, favourable flat‑field performance under large depth‑of‑field conditions and outstanding stereoscopic effect.
Accurate Magnification Positioning: Key magnification settings support precise repeated positioning, which improves the consistency and accuracy of observation and inspection work.
Comfortable and Efficient Operation: The 45° inclined viewing head, dual‑sided operating handwheels and adjustable interpupillary distance ease fatigue during long‑hour operation and boost working efficiency.
Powerful Expandability and Compatibility: Multiple auxiliary objectives and viewing heads are available. The digital‑configuration model enables Wi‑Fi data transmission to meet diverse recording and analysis requirements.
Stable, Reliable and Durable: Premium‑grade optical and mechanical components together with a dependable focusing mechanism sustain stable performance and measurement accuracy over long‑term service.
Equipment Working Diagram
