← ALL TECHNOLOGY GUIDES

OPTICAL ENGINEERING

Optical technology & endoscopes

Two light paths. One surgical view.

A clear surgical image starts with the scope—not only the monitor.

HOW IT WORKS
Rigid endoscopes with different viewing configurations
ENDOSCOPES
Illumination
Light travels towards tissue
Image relay
Reflected light returns to the camera
Viewing angle
Direction of view ≠ field of view

THE PRINCIPLE

How it works

An endoscope brings illumination to the field and carries the image back to the camera or an integrated sensor. The scope, coupler, camera, light source and monitor work as one imaging chain. A high-resolution display cannot restore detail that was not captured.

01

Separate illumination from imaging

In a rigid optical laparoscope, illumination fibres carry light towards the operative field. An objective and relay-lens system convey the returning image to the eyepiece and camera. These are different paths within the same instrument.

02

Know where the sensor sits

A rod-lens telescope relays an optical image to an external camera. A chip-on-tip videoscope places its image sensor distally. Olympus ENDOEYE is a manufacturer example of the latter, not a specification for UnivLabs scopes.

03

Choose geometry for the procedure

Diameter, working length and direction of view are separate specifications. A 30° direction of view describes an oblique view; it does not mean a 30° total field of view. Verify the exact model and its NIR compatibility.

Published optical-system drawing: panel e shows a rigid laparoscope with its rod-lens relay and illumination path
Read panel (e): the rigid laparoscope. Separate illumination and image paths are shown alongside other spectral-imaging configurations. Clancy, Jones, Maier-Hein, Elson & Stoyanov, Surgical spectral imaging (2020), Figure 2. CC BY 4.0.
Evidence: [1] Clancy et al. — Surgical spectral imaging (2020) ↗[2] Olympus — ENDOEYE 3D, chip-on-tip imaging ↗[3] KARL STORZ — HOPKINS NIR/ICG telescope specifications ↗

BEFORE YOU CHOOSE

Ask the right questions.

Assess the exact scope, camera, processor, accessories and service package you will receive. A demonstration should use that configuration.

  • Scope diameter, length and viewing angle for the intended procedure.
  • Image clarity across the field and at relevant working distances.
  • Compatible camera couplers, light cables and NIR transmission where ICG is required.
  • Validated cleaning, sterilisation, repair and service requirements.

FOR SURGEONS & HOSPITAL TEAMS

Frequently asked questions

Does a 4K monitor make every scope 4K?

No. Evaluate the complete optical and video chain, not the display specification alone.

Can an existing scope be used for ICG?

Only if its manufacturer specifies compatible near-infrared performance and the proposed system supports it.

What should a demonstration include?

Use the proposed scope and full imaging chain to review focus, colour, edge detail and handling under representative conditions.

DISCUSS YOUR REQUIREMENTS VIEW SURGICAL SUITES