Optical profile Projector Working principle (Construction)
List of components
Light source
Condenser Lens (C)
Projection Lens (P)
Screen
Let’s see how these components are working together to make a measurement.
A beam of light from the light source is passed thru the condenser lens(C) and Projection lens(P) and fall on the Screen. the workpiece will be placed in between the light source and condenser lens. A shadow image of the workpiece will be created. while we placed the workpiece.
The magnified image will be shown on the screen. This magnification is up to 5 to 100.
Working with Optical profile Projector
See the following Schematic diagram of Profile Projector
There is a lamp source, it can be a tungsten lamp or a filament lamp or a mercury lamp. Coming to workpiece holding table it will be stationary or it can be movable with an angular adjustment. There are two lenses, one is condenser lens (Collecting and directing the light) Projecting Lens. A mirror is placed to reflect the image on to the screen. This is how a commercial profile projector is constructed.
Let’s see how it will work to compare the workpiece with a working standard.
When an object is placed in between condenser lens and the light source, a shadow of the profile is projected at some enlarged scale on the screen. this enlarged profile will be used to compare with the working standard.
Here, Lenses plays a significant role in the magnification of the profile(Image).
Optical Profile Projector Applications
Optical profile projectors have a wide range of applications.
Used in the automotive industry to inspecting surface deformities.
In glass Producing industries to inspecting minute flaws in glassware.
Used to inspect the components with irregular shapes and sizes.