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Precision
Optics |
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CNI design and manufacture of precision
optical components and assemblies. As described
in the customer solutions, we have strong
capability to design and fabricate custom made
optics with variously optical materials. |
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◆Coated
Laser Crystal |
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CNI
is capable of supplying a large quantity of
laser crystals with high damage coatings to meet
the tough requirement from both the OEM and R&D
customers. |
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Standard Product |
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Crystals |
Doping |
Size(mm3) |
Coating |
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Nd:YVO4 |
1% |
3x3x2 |
Coated for 1064 nm, 532 nm, 1342 nm,
671 nm laser as required. |
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0.5% |
3x3x5 |
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Nd:YAG |
1% |
3x3x2 |
Coated for 1064 nm, 532 nm, 946 nm,
473 nm laser as required. |
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1% |
3x3x3 |
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◆Output Coupler |
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An output coupler (OC) is a partially reflective
mirror used in lasers to extract a portion of
the laser beam from the optical resonator. Lasers
operate by reflecting light between two or more
mirrors which have an active laser medium
between them. The medium amplifies the light by
stimulated emission. For lasing to occur, the
gain of the active medium must be larger than
the total loss, which includes both unwanted
effects such as absorption, and the intentional
release of energy through the output coupler. In
other words the laser must attain threshold. |
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Standard Product |
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Wavelength |
Size |
Coating |
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473 nm OC |
ø4 mm,
R=50/100/200 mm |
Plano-Concave, HR946 nm,
HT473nm |
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532 nm OC |
ø4 mm,
R=50/100/200 mm |
Plano-Concave, HR1064 nm,
HT532nm |
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671 nm OC |
ø4 mm,
R=50/200 mm |
Plano-Concave, HR1342 nm,
HT671nm |
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1064 nm OC |
ø4 mm,
R=50/100/200 mm |
Plano-Concave,
PR1064nm |
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◆Frequency
Doubling
Crystal |
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Frequency
Doubler
or
Second
Harmonic
Generation
(SHG) is
a
special
case of
sum
frequency
generation
if the
two
input
wavelengths
are the
same.
The
simplest
scheme
for
frequency
doubling
is
extracavity
doubling.
The
laser
passes
through
the
nonlinear
crystal
only
once.
However,
if the
power
density
of laser
is low,
focused
beam,
intracavity
doubling
and
external
resonant
cavity
are
normally
used to
increase
the
power
density
on the
crystals. |
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Standard Product
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Crystals
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Size(mm3)
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Coating |
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LBO
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2x2x5 |
AR@1064nm&532nm/946nm&473nm/1342nm&671nm |
| 2x2x10 |
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KTP
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2x2x5
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AR@1064nm&532nm |
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2x2x9
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BBO
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2x2x5
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AR@1064nm/532nm/266nm |
| 2x2x10 |
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◆Lens |
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Standard Product |
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Material: BK7 grade A optical glass |
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Design Wavelength: 546.1 nm |
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Design Index: 1.5183 ±0.0005 |
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Diameter Tolerance: +0.0, -0.15 mm |
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Paraxial Focal Length: ±2% |
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Centration: 3 arc minutes |
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Clear Aperture: >80% |
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Bevel: 0.25 mm x 45° |
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Surface Quality: 60-40 scratch and dig |
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Surface Figure: l/4@632.8nm |
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Lens |
Part
No. |
Illustration |
Property and
Application |
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Plano-Convex
Lens |
L01 |
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Positive
focus length. Suitable when one conjugate is more than five
times the other. Also where both conjugates are on the same side of
the lens. |
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Double-Concave Lens |
L02 |
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Negative
lens with the form suited to producing diverging light or a
virtual image, where the input light is converging. |
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Plano-Concave
Lens |
L03 |
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Negative
lens with the form suitable where one conjugates is more than
five times the other, e.g. producing divergent light from a
collimated input beam. |
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◆Polarizer |
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When a natural beam
transmits through the dichroic material, one of
the orthogonal polarization component of the
beam is strongly absorbed and the other goes out
with a weak absorption. So, polarizer can be
used to convert randomly polarized beam into
linearly polarized beam. |
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Substrate
Material
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BK7 or B270 |
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Wavelength range
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400-700 nm |
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Dimension
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12.7mm/ 25.4mm |
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Extinction Ratio
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>1000:1 |
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◆Waveplate |
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Crystalline quartz is frequently used in strictt quality retardation applications,
Zero-order waveplate is made by cementing
together two quartz plates with their fast axes
orthogonal to each other. The difference in
thickness is equal to either λ/4
or λ/2
for a specified wavelength. Compared with
multiple-order quartz retarders, they are much
more insensitive to the variation of retardation
with wavelength, temperature and angle of
incidence. Waveplates of other wavelength and
sizes are custom made. |
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Half Waveplate
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When applying a linearly polarized beam to a
half waveplate, it emerges as a linearly
polarized beam but its polarization plane is
rotated with respect to the polarization plane
of the input beam. The rotation of the
polarization plane is such that the angle
between the input polarization and the output
polarization is twice the angle between the
input polarization and the waveplate's axis.
When applying a circularly polarized beam, a
clockwise circular polarization will transform
into a counter-clockwise circular polarization
and vice versa. |
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Quarter Waveplate
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When applying a linearly polarized beam with the
polarization plane aligned at 45deg to the
waveplate's principal plane, the output beam
will be circularly polarized. Similarly when
applying a circularly polarized beam to a ¦Ë/4
waveplate the output beam will be linearly
polarized. When a quarter waveplate is double
passed, i.e. by mirror reflection, it acts as a
half waveplate and rotates the plane of
polarization to a certain angle. Quarter
waveplates are widely used in creating circular
polarization from linear or linear polarization
from circular, ellipsometry, optical pumping,
suppressing unwanted reflection, optical
isolation and etc. |
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Type of Waveplate
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Type |
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Feature |
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Zero Order |
Cemented |
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Cemented by glue
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Better Temperature Bandwidth
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Wide Wavelength Bandwidth
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Moderate damage threshold
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Optical Contacted |
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No glue
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Better Temperature Bandwidth
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Wide Wavelength Bandwidth
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Better damage threshold
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Air Spaced |
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No glue, Mounted
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Better Temperature Bandwidth
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Wide Wavelength Bandwidth
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High damage threshold
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True Zero Order |
Cemented |
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Cemented by glue
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Better Temperature Bandwidth
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Wide Wavelength Bandwidth
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Moderate damage threshold
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Single Plate |
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Single plate
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Better Temperature Bandwidth
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Wide Wavelength Bandwidth
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High damage threshold
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Only 1310nm, 1550nm available
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Multi Order |
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Low Temperature Bandwidth
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Low Wavelength Bandwidth
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High damage threshold
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Low cost
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Specification
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Material: |
Crystal Quartz |
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Dimension allowance |
+0.0, -0.15mm |
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Phase contrast Retardation |
λ/8,λ/4,λ/2, or discretional |
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Wavefront
distortion |
≤λ/4@632.8nm
barring Cemented Waveplate |
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Retardation tolerance |
≤λ/300、≤λ/500 |
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Wavelength range |
260-1600 nm |
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Parallelism |
≤1 arc second |
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Surface quality |
20/10 scratches and dig |
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Clear aperture |
≥90% |
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AR coating |
R≤0.25% at central wavelength |
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Comparison of Waveplates
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Order of Waveplate |
Multi |
Low |
Cemented Zero |
Cemented Broad-band Zero |
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Total Thickness (mm) |
~1 |
≤0.5 |
1.5~2 |
1.5~3 |
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Spectral Bandwidth (nm) |
0.5 |
1.5 |
30 |
110 |
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Standard Products of Multi Order
Half-Waveplates
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Item No. |
Dia.(mm) |
Wavelength |
OD |
Thickness |
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HWPZ-445-12 |
12.7mm |
445nm |
1.0" |
0.7mm |
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HWPZ-457-12 |
12.7mm |
457nm |
1.0" |
0.7mm |
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HWPZ-473-12 |
12.7mm |
473nm |
1.0" |
0.7mm |
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HWPZ-532-12 |
12.7mm |
532nm |
1.0" |
0.7mm |
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HWPZ-589-12 |
12.7mm |
589nm |
1.0" |
0.7mm |
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HWPZ-638-12 |
12.7mm |
638nm |
1.0" |
0.7mm |
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HWPZ-671-12 |
12.7mm |
671nm |
1.0" |
0.7mm |
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HWPZ-914-12 |
12.7mm |
914nm |
1.0" |
0.7mm |
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HWPZ-946-12 |
12.7mm |
946nm |
1.0" |
0.7mm |
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HWPZ-1064-12 |
12.7mm |
1064nm |
1.0" |
0.7mm |
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HWPZ-1122-12 |
12.7mm |
1122nm |
1.0" |
0.7mm |
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HWPZ-1342-12 |
12.7mm |
1342nm |
1.0" |
0.7mm |
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◆Line Generator |
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CNI can offer line lasers
at all existing wavelengths and output
power, also the divergence are available infan
angles of 5°, 7°, 10°, 30°, 45°, 60°, 75°,
90° and 100° for custom applications. These
series lasers can be used to display a
uniform straight reference line for use in
alignment, machine vision systems,
construction and process control. |
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Specification
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Part
No. |
Full
fan Angle (α°) |
Material |
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LG## |
7°,
10°, 30°, 45°, 60°, 75°, 90° |
BK7 |
Note: Other sizes, angles are available upon request
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◆Beam
Splitter & Combiner |
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Product Detail
Broadband polarizing cube beamsplitters provide efficient polarization for use
with multiple or tunable sources. Each polarizer consists of a pair of precision
right-angle prisms carefully cemented together to minimize wavefront distortion.
The hypotenuse of one of the prisms is coated with a multilayer dielectric
polarizing beamsplitter coating optimized for a broad wavelength range. The four
faces are antireflection coated with a multilayer dielectric coating to minimize
surface reflection losses.
An unpolarized beam is split into two orthogonal, linearly polarized components.
P-polarized light is transmitted, while s-polarized light is reflected, both
with negligible absorption. The extinction ratio is better than 500:1, yet it
averages 1000:1. This unique component provides all the benefits of a broadband
polarizer in a standard cube configuration.
Broadband polarizing cube beamsplitters are available in four wavelength ranges
covering the visible through near infrared. They are offered in two sizes:12.7
and 25.4 mm. |
Specification
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Material |
BK7grade A
optical glass, Fused silica |
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T/R: |
50/50±5％
for specified wavelength
R=(Rs＋Rp)/2，T=(Ts＋Tp)/2 |
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Incidence Angle:
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0°±2° |
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Beam Deviation: |
0°±3'(T)，0°±5'(R) |
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Coatings:
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dichroic
multiplayer beamsplitter film on hypotenuse, AR
film on the four polished surfaces of the prism |
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Surface Flatness:
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0.3-3 |
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Surface Quality: |
20/10 to 80/50 |
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Clear Aperture: |
>90%
dimension |
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Application: |
Spectrophotometer,
interferometer, tunable laser etc. |
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Dimension, T/R,
incident angle, wavelength range or other specs
are available upon request. |
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Standard Wavelength
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Narrow Band |
532, 632.8, 780, 850, 1064, 1550nm |
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Broad Band |
450-650, 650-900, 900-1200nm |
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◆Mirror
& Windows |
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Standard Product |
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No |
A (mm) |
B
(mm) |
C (mm) |
D |
E |
Material |
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1 |
26±0.2 |
4.6±0.2 |
1.8±0.2 |
¢22 |
¢33-0.1 |
H-K9L (or H-BaK7) |
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2 |
24±0.1 |
4±0.05 |
1.15±0.2 |
¢22 |
¢34-0.1 |
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Specification |
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AR coating (400-700nm) R≤0.5%
Metal Reflecting T≤0.5%
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Standard Product |
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No |
A (mm) |
B
(mm) |
C (mm) |
PV Value |
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Material |
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1 |
5.0±0.1 |
5.0±0.1 |
0.7±0.1 |
<0.02 (Test by ZRGO Test area 5×5) |
Coating on side (532nm, 635nm,
808nm, IR-CUT) |
B270 (H-K9L) Soda Lime |
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2 |
20±0.1 |
20±0.1 |
1±0.02 |
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3 |
80±0.1 |
80±0.1 |
(0.5,0.7,1.0,1.5,1.7,2.0,3.0mm)±0.03 |
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4 |
76±0.1 |
76±0.1 |
(0.8,1.0,1.5,2.0,2.5mm)±0.03 |
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5 |
60±0.1 |
60±0.1 |
5.6±0.03 |
2.02 |
808nm±45:
R≥98% |
H-K9L |
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6 |
11.6±0.1 |
11.6±0.1 |
2.2±0.03 |
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AR |
ZAB25 |
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7 |
5.2±0.05
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5.2±0.05 |
1±0.03 |
0.02 |
Coating MgF2 |
Quartz glass |
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