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| Based on our two large
production lines in fabricating plan and sphere optical
components and our skilful engineers and technicians, Rising
EO is not only capable of serving high volume order but
also in a position to provide as few as single piece custom-made
part.
Rapid Prototypes
We have an entire infrastructure devoted to rapid prototyping.
This consists of dedicated equipment and personnel. Use
Rising EO as an extension of your machining department for
quick turn around requirements.
Quick to Production
Through an automated process, Rising EO rapidly uses prototype
design data to generate programs for our production machines.
Advanced Manufacturing
Techniques
Our agile, streamlined approach to machining is done through
significant investments in palletizing parts. Our approach
is to fixture and pallet your part to reduce set-up time
and labor costs. Production machining centers run in a low
cost, lights-out mode. We fabricate precision optics using
high speed polishing and advanced coating techniques.
Common manufacturing
Rising EO can provide are:
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Rough Grounding
Using a curve generator, a super high-speed machine
equipped with an artificial diamond grindstone, the
surface of the pressed glass is ground until it becomes
a curved surface with specified roughness and dimensions. |
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Fine Grounding
Following rough grinding, the lens is subjected to
fine grinding. The surface of the lens is ground with
high precision using an artificial diamond pellet
platter to attain proper roughness and surface curve.
To reduce the time factor and enhance the precision
of the polishing step which follows, precision of
0.01mm is required during this step. |
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Polishing
Following fine grinding, the lens is polished. Using
an abrasive sheet-lined platter, lenses are polished
until the surface roughness reaches the specified
level to the order of a submicron (less than 0.001mm).
At the same time, the surface curvature is also precisely
adjusted. During this step, the surface of the lens
becomes more and more transparent. Both front and
back surfaces of pressed and shaped glass, originally
opaque, are polished to achieve a transparent lens. |
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Inspection
Following polishing, the precision of the lens surface
is checked using laser beams. Based on the status
of fringes, or lines, indicating surface precision
(interference fringe), the lenses are determined to
be either acceptable or unacceptable. Those that pass
inspection are cleaned in an ultrasonic washing machine
before being transported to the next stage. |
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| Alignment (Centering)
The lens periphery is milled to correct decentration
to the optical axis. Using a diamond grindstone, the
periphery of a polished lens, supported by two bell
holders positioned on an axis, is milled to the specified
dimension. |
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| Coating
To prevent the reflecting back of light which passes through
the lens, and to protect the surface, the lens is processed
with a special coating of thin film (antireflection film).
After having received a thorough cleaning in the ultrasonic
washing machine, the lens is placed into a vacuum evaporator,
where an evaporation substance is sprayed on the lens. |
| Assembly
Following a careful cleaning, the lenses are incorporated
in the sub-barrel. The third lens is the first to
be placed, followed in order by the second and first
lenses. As the second lens is made of fluorite, extremely
careful handling is required. After each lens has
been placed in its respective position within the
sub-barrel, they are firmly secured with mounting
rings and adhesives. The precision lens is expertly
assembled by the hands of skilled technicians. |
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