| Microlens arrays are a vital part of today's
optical systems. From telecommunications to machine vision, microlenses
are impacting the way we live. . Now, by applying MEMS Optical’s
patented gray scale production process, MEMS Optical can design
and fabricate microlenses that are:
a. refractive
b. diffractive
c. anamorphic
d. aspherical
e. spherical
f. positive (convex)
g. negative (concave)
Lenses can be either refractive or
diffractive and can be as small as 15 microns diameter. Using standard
materials such as fused silica and silicon and newer materials such
as Gallium Phosphide and Calcium Fluoride a wide variety of
lenses can be made. Lenses can be made on one side with absolute
alignment accuracies which allow each lens to be within 0.25 microns
of it's ideal location and a front to back surface alignment
capability that allows lenses on both sides of a substrate to
be aligned to within 1 micron. Surface roughness values of 20 to
80 angstroms RMS are typical and the addition of AR coatings produces
optics with very high transmission rates.
MEMS Optical has a full design staff
capable of designing lenses for customers who don't have a design
capability. Both stock and custom designs
are available.
Features and Benefits
- Excellent uniformity in focal length
and extremely low insertion loss for 1D and large 2D array configurations
- High Transmission with Low Insertion Loss (<0.5 dB)
- Spherical Error <15nm rms, <70nm
p-v
- Diffraction limited lenses possible
Applications
- DWDM (MUX, DeMUX, Optical add/drop)
- Optical Switches, Amplifiers, and
Isolators
- Variable Optical Attenuators
- Waveguide to Fiber Coupling
|
Top:
Cylindrical microlens array
Center:
Circular lenses, square packed
Bottom:
Hexagonal lenses, hex packed
|
