If you work in aviation, power generation, manufacturing or even home inspection, chances are a borescope is one of your go-to tools. These slim visual inspection devices let you “see” inside engines, pipes, cavities and welds without tearing anything apart. Modern borescopes are portable, video-enabled and packed with features—but they all trace back to a surprisingly recent breakthrough.
So who actually invented the borescope, and how did we get from rigid optical tubes to today’s flexible video systems? The answer takes us from early medical instruments through the birth of fiber optics and into the world of industrial inspection as we know it today.
Before borescopes: peeking inside the impossible
Long before anyone used the word “borescope,” engineers and doctors were obsessed with a simple problem: how do you look inside something you can’t open up?
In the early 19th century, German physician Philipp Bozzini developed one of the first endoscope-type devices to look inside the human body using candlelight and mirrors. It was crude, but it proved that indirect visual inspection was possible.
By the early 20th century and through World War II, rigid optical tubes were used to inspect the inside of large gun barrels and other critical components. These early “bore scopes” (literally, scopes for bores) relied on lenses and simple illumination to let users check for defects such as cracks or erosion without dismantling heavy equipment.
These tools were groundbreaking for their time, but they were limited: they were rigid, had narrow fields of view and produced relatively dim images. What they were really waiting for was a revolution in how light could be transmitted.
The leap to fiber optics and the first modern borescope
The real turning point came with the development of practical fiber optics in the mid-20th century. By bundling thousands of ultra-thin glass fibers together, scientists could transmit an image around curves and through tight spaces with far better clarity than previous systems.
This is where the modern borescope story truly begins. In 1960, Indian-American physicist Narinder Singh Kapany—often called the “Father of Fiber Optics”—and American optical physicist Brian (or Broan) O’Brien are widely credited with inventing the first modern borescope.
Their design used coherent fiber bundles to relay an image from the tip of the scope back to the viewer’s eye. For the first time, inspectors could:
- Navigate around bends and corners
- See brighter, sharper images inside confined spaces
- Inspect parts without destructive disassembly
This combination of flexibility and image quality is what separates “borescope-type” devices of the 1930s and 40s from what most professionals recognize as a borescope today.
From lab innovation to an everyday inspection tool
Once the basic concept proved itself, industrial borescopes evolved quickly. Optics experts and manufacturers refined lens designs, improved illumination and experimented with different tube diameters to match more specialized applications.
Today’s borescopes include:
- Rigid borescopes – Ideal for straight-line access with excellent image quality
- Flexible fiberscopes – Using fiber bundles for navigation around bends
- Video borescopes – With miniature cameras at the tip and LCD screens for viewing and recording
Companies like USA Borescopes specialize in matching these tools to real-world challenges, drawing on decades of optical innovation to support technicians in aviation, power generation, oil & gas, manufacturing, building inspection and more. You can see how that expertise translates into their story and experience on their About Us page.
As inspection work has become more demanding—higher temperatures, tighter tolerances, smaller access points—borescopes have kept pace. Advanced articulation, higher-resolution sensors and ruggedized housings have turned what started as a niche optical experiment into an everyday essential. Many of these gains are now bundled into tailored services and support that help organizations run safer, leaner maintenance programmes.
Why the borescope’s inventor still matters
Understanding who invented the borescope isn’t just a piece of trivia—it helps explain why modern inspection looks the way it does. Without Kapany and O’Brien’s breakthrough in using fiber optics for internal visual inspection, many of today’s non-destructive testing practices simply wouldn’t be possible at the same speed, cost or level of detail.
Their work laid the foundation for:
- Faster, more accurate defect detection
- Fewer unnecessary teardowns and costly overhauls
- Safer operation of engines, turbines, boilers and other critical assets
USA Borescopes builds on that legacy by supplying a wide range of borescopes and inspection cameras, along with guidance on how different industries—from aviation to energy and beyond—use these tools in practice. If you want to see how borescopes are applied across real-world sectors, explore the company’s dedicated industries overview.
Whether you’re just starting to use remote visual inspection or you’re looking to upgrade aging equipment, it helps to partner with a specialist who lives and breathes borescopes every day. USA Borescopes can help you choose the right system, configure it for your application and keep it working reliably in the field. To discuss your inspection needs or get expert help choosing a borescope, contact USA Borescopes today.
About the Author
The author is a remote visual inspection specialist with extensive experience in industrial maintenance, aviation support and optical technology. They focus on explaining how inspection tools evolve and why innovations like fiber-optic borescopes matter today. Their work helps technicians and engineers choose the right equipment for safer, more efficient operations.