Part 2: Reading Plugs, pistons, and valves (with Pics)

[Barry Tisdale]

Those aren't all that hard to put together; board cameras are cheap enough
these days, but fiberoptics get a bit pricy, especially coherent (image
forming).  I use intra-oral cameras daily, and fooled around w/ several DIY
jobs also.  Really all you want is a small lens, small enough to pass thru
the sparkplug opening - Edmund Scientific has all kinds.  What kind of
lens, I wouldn't know, but I made a nice semi-macro lens from a microscope
eyepiece; reverse it in front of the camera (remove its lens) - can vary
focus from 1" to infinity.  A 5x eyepiece should be about right.  A 45°
mirror of less than 1/2" would easily pass thru the plug opening.  Couple
of white LEDS to get light in there, should be do-able.

Barry

At 11:23 AM 12/03/2000 -0800, Dave Zug wrote:
>ever had access to an arthroscope (SP?) I'd like to borrow one of those
>babies for a day. With fibre and little PC cameras so cheap nowadays seems
>like a great DIY project! Take a $19 PC camera apart, extend the wiring to
>the lens , add a dozen strands of fibreoptics to a fibreglass rod for a
>light source and shove it down an intake port and maybe into the open valve?
>is 0.510" too narrow for one of those lenses?  oops I guess you need a way
>to direct the lens to point other directions.. hmmm..

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