Some specialists are interested in rigid borescopes and they want to know their pros and cons.
The illumination can be provided either by LED light source attached as a handle to the light post of the borescope, or by external powerful Metal Halide, Xenon or Halogen light source. In this case the light is transferred via flexible glass fiber guide.
image of the object is formed by the objective lens and magnified by the
eyepiece, which presents it to the eye.
What are advantages of rigid borescopes? They provide a superior image at a lower cost compared to a flexible fiberscopes. The image is exceptionally clear. When an object is located within direct access, rigid borescopes work well. They are recommended for gunsmithing, automobile inspection like observation of automotive cylinders, injectors and hydraulic bodies. It is possible to attach a video camera to the eyepiece, and after that the inspector can record video and still images for further processing.
What then are disadvantages of rigid borescopes? Rigid borescopes are limited to access to a straight line. It is impossible to view hidden objects behind something. Besides they are fragile instruments and don’t like falling down.There are many rigid borescopes in the market with diameter from 1.8 mm to 8 mm and length from 10 cm to 90 cm. As you can see they have more advantages than disadvantages and can be very efficient for inspection work