Junior Medical Monocular Microscope (BM-4)

Key Features

• Wide-field 10X eyepiece or set of 10X & 15X Huygenian eyepieces

• Achromatic 10X and 45X objectives for sharp imaging

• Triplet revolving nosepiece with firm click stops

• Smooth coarse focusing using rack-and-pinion mechanism

• Fine focusing with screw lever for precise adjustments

• Abbe condenser NA 1.25 with iris diaphragm for improved illumination

• Condenser movement through rack-and-pinion for accurate light control

• Swing-out filter holder for contrast enhancement

• Arc reflector for natural light illumination

• High-quality stainless steel stage clips for slide stability

• Strong body with durable components suitable for repeated classroom use

• Packing available in styrofoam box or optional wooden cabinet

• Includes vinyl dust cover and operating manual

Working Principle

The BM–4 functions on transmitted light microscopy, where light passes upward through the specimen to create a magnified image.
The natural light collected by the arc reflector is focused by the Abbe condenser, which includes an iris diaphragm for brightness and contrast control. The condenser’s rack-and-pinion movement enables precise alignment with the slide for optimized illumination.

The achromatic objectives magnify the specimen while reducing chromatic distortion, ensuring clear and accurate visualization. This primary image is further enlarged through the wide-field eyepiece so students can observe fine details of tissues, cells, and microorganisms.

For focusing, the microscope uses a dual-adjustment system: rack-and-pinion for quick coarse movement and screw lever fine focus for delicate adjustments. This helps beginners achieve sharp and stable views effortlessly, enhancing practical learning.

Use Cases

• School and college biology laboratories

• Basic medical and paramedical training

• Study of tissue sections and microscopic samples

• Observing microorganisms and prepared slides

• Hands-on practice for practical exams and science projects