Manual Focimeter NJC-4 – Optical Lens Power Measuring Instrument

The NJC-4 Manual Focimeter is a precision optical instrument designed to measure the refractive power and optical characteristics of spectacle lenses. It accurately measures spherical power, cylindrical power, cylinder axis, prism power and prism base direction for prescription lens verification. Featuring a clear optical viewing system, manual focusing controls and dual AC/DC power options, the NJC-4 is suitable for optical shops, optometry clinics, ophthalmology centres and optical lens manufacturing laboratories. Key Features & Specifications - Equipment Type: Manual Optical Focimeter - Model: NJC-4 - Measurement Technology: Manual optical measurement - Spherical Power Range: -20.00D to +20.00D on common NJC-4 configurations - Measurement Graduations: 0.12D between -5D and +5D; 0.25D outside this range on specified versions - Eyepiece Focusing Range: ±5.00D - Cylinder Axis Measurement: 0°–180° - Axis Graduation: 1° on selected versions - Prism Measurement Range: 0–5 prism dioptres (Δ) - Prism Graduation: 1Δ - Prism Compensation: Optional on selected versions, extending measurement capability - Prism Base Direction: 0°–180° - Lens Diameter Compatibility: Approximately 20–85 mm on common models - Measurement Display: External mechanical scale - Lens Marking: Built-in optical centre and axis marking mechanism - Lens Compatibility: Single-vision and suitable bifocal/cylindrical spectacle lenses - Illumination: Internal lamp - Power Supply: AC 110V/220V or DC 3V, depending on version - Battery Operation: Two 1.5V batteries on compatible versions - Operation: Manual focusing and lens adjustment - Construction: Metal and durable plastic housing - Design: Compact benchtop optical instrument - Applications: Spectacle lens power measurement, prescription verification, optical centre identification and lens inspection - Suitable Facilities: Optical shops, optometry clinics, eye hospitals and optical laboratories