What is a fiber optic taper?

Fiber Optic Taper

A Fiber Optic Taper is an optical device that functions by changing the diameter of a coherent fiber optic bundle, effectively altering the size of the image transmitted through the fibers. It consists of numerous individual optical fibers that are fused together, with one end of the taper being larger than the other. This configuration allows the taper to collect light from a larger area and concentrate it into a smaller output, or vice versa, depending on the direction of light transmission.


  • Image magnification or reduction in optical systems.
  • Enhancing the resolution of sensor devices.
  • Minimizing the size of projected images in display technologies.
  • Adapting image sizes to fit different sensor formats.

Construction and Working Principle

The construction of a fiber optic taper involves tightly packing and fusing together thousands of individual optical fibers. Each fiber operates by the principle of total internal reflection, guiding light from one end to the other. The tapering process involves heating and stretching the fiber bundle to create a gradual change in diameter along its length. This process ensures that the optical path of each fiber is maintained, allowing for the coherent transmission of images with minimal distortion.


  • High resolution and excellent image fidelity.
  • Compact size and lightweight, making them ideal for portable optical devices.
  • Ability to transmit images over long distances with minimal loss.
  • Highly adaptable to various applications, from medical imaging to industrial inspection.


When integrating a fiber optic taper into an optical system, several factors must be considered, including the taper ratio (the difference in diameter between the two ends), numerical aperture, and the potential for optical aberrations. The choice of taper ratio affects the degree of image magnification or reduction, while the numerical aperture influences the light-gathering capability of the taper. Additionally, careful design and alignment are necessary to minimize optical aberrations and ensure the highest quality image transmission.

Back to blog

Leave a comment