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Precision optical components
CNI Laser has a team of experienced optical component design engineers, capable of designing and manufacturing high-precision optical components and accessories of various materials for customers.
Laser Output Mirror 
The output mirror is a crucial component for achieving laser output in the resonant cavity. Laser light is generated through stimulated emission and amplification by reflecting back and forth between two or more mirrors with an active medium. To obtain laser light, the gain of the active medium must be greater than the initial energy release loss of the output mirror. CNI can provide dedicated output mirrors for lasers of different wavelengths.
| Wavelength | Dimensions | Film system |
473nm OC | ø 4mm, R = 50/100/200mm | Flat Concave mirror, HR |
532nm OC | ø 4mm, R = 50/100/200mm | Flat Concave mirror, HR |
| 671nm OC | ø 4mm, R = 50/200mm | Flat Concave mirror, HR |
| 1064nm OC | ø 4mm, R = 50/100/200mm | Flat Concave mirror, HR |
Lens
Design wavelength | 546.1nm |
Design Metrics | 1.5183 ±0.0005 |
Diameter Tolerance | +0.0, -0.15mm |
Near-axis focal length | ±2% |
Coaxiality | 3 arc minutes |
Aperture for Light Transmission | >80% |
Sloping surface | 0.25 mm x 45° |
Surface quality | 60-40 scratch and dig |
Flatness | l/4 at 632.8 nm |
Lens Type | Model | Illustration | Features |
Plano-convex lens | L01 |  | Positive Focal Length Lens |
Biconcave lens | L02 |  | Negative focal length lens |
Plane-concave mirror | L03 |  | Negative focal length lens |
Polarizer
When natural light passes through a dichroic material, one orthogonal polarization component of the light beam is strongly absorbed, while the other is weakly absorbed and transmitted. Therefore, a polarizer can be used to convert randomly polarized light into linearly polarized light.
Substrate material | BK7 or B270 |
Wavelength range | 400–700 nm |
Diameter | 12.7mm / 25.4mm |
Extinction Ratio | 1000:1 |
Wave plate
A waveplate, also known as a phase retarder, is fabricated from birefringent materials. It induces a phase shift between the two mutually orthogonal polarization components passing through it and can be used to adjust the polarization state of the light beam. CNI's waveplates are made of quartz crystals, mainly including half-wave plates and quarter-wave plates. Waveplates with various wavelengths and sizes can be customized.
Half-wave plate
After linearly polarized light passes through a half-wave plate (HWP), it remains linearly polarized light. However, the vibration plane of its resultant vibration rotates by 2θ relative to that of the incident linearly polarized light. If θ = 45°, the vibration plane of the emergent light is perpendicular to that of the original incident light—meaning the half-wave plate can rotate the polarization state by 90° when θ = 45°. Additionally, the half-wave plate can be used in conjunction with a polarization beam splitter (PBS). By rotating the half-wave plate, a beam splitter with a variable splitting ratio can be achieved.
Quarter-wave plate
A waveplate, also known as a phase retarder, is fabricated from birefringent materials. It induces a phase shift between the two mutually orthogonal polarization components passing through it and can be used to adjust the polarization state of the light beam. CNI's waveplates are made of quartz crystals, mainly including half-wave plates and quarter-wave plates. Waveplates with various wavelengths and sizes can be customized.
Waveplate Type
Type
| Features | |
Zero-order wave plate | Gluing |
|
Optical adhesive |
| |
| Air gap |
| |
True Zero-Order Waveplate | Gluing |
|
| Single-piece |
| |
Multi-level waveplate |
| |
Technical specifications
| Materials | Quartz crystal |
| Diameter Tolerance | +0.0, -0.15mm |
| Phase Delay Accuracy | λ/8, λ/4, λ/2, or discretionary |
| Wavefront Distortion ( Single-piece ) | ≤λ/4 @ 632.8 nm, excluding Cemented Waveplate |
| Delay amount | ≤λ/300 、 ≤λ/500 |
| Wavelength range | 260–1600 nm |
| Parallelism | ≤1 arc second |
| Surface quality | 20/10 scratches and digs |
| Aperture for Light Transmission | ≥90% |
| Anti-reflective coating | R ≤ 0.25% @ Central wavelength |
Waveplate parameters | Multi-level | Low-level | Zero-grade plywood | Zero-level bandwidth bonding |
Thickness (mm) | ~1 | ≤0.5 | 1.5–2 | 1.5–3 |
Spectral line width (nm) | 0.5 | 1.5 | 30 | 110 |
Model | Diameter (mm) | Wavelength | OD | Thickness |
HWPZ-445-12 | 12.7mm | 445nm | 1.0" | 0.7mm |
HWPZ-457-12 | 12.7mm | 457nm | 1.0" | 0.7mm |
HWPZ-473-12 | 12.7mm | 473nm | 1.0" | 0.7mm |
HWPZ-532-12 | 12.7mm | 532nm | 1.0" | 0.7mm |
HWPZ-589-12 | 12.7mm | 589nm | 1.0" | 0.7mm |
HWPZ-638-12 | 12.7mm | 638nm | 1.0" | 0.7mm |
HWPZ-671-12 | 12.7mm | 671nm | 1.0" | 0.7mm |
HWPZ-914-12 | 12.7mm | 914nm | 1.0" | 0.7mm |
HWPZ-946-12 | 12.7mm | 946nm | 1.0" | 0.7mm |
HWPZ-1064-12 | 12.7mm | 1064nm | 1.0" | 0.7mm |
HWPZ-1122-12 | 12.7mm | 1122nm | 1.0" | 0.7mm |
HWPZ-1342-12 | 12.7mm | 1342nm | 1.0" | 0.7mm |
Polarizing Beam Splitter
Broadband polarization beam splitters (PBS) can effectively perform polarization beam splitting for multiple light sources or tunable light sources. Each polarizer consists of a pair of high-precision right-angle prisms carefully cemented together to minimize wavefront distortion. The hypotenuse of the prisms is coated with a polarization beam-splitting dielectric film, and the four outer surfaces are coated with broadband multi-layer anti-reflective (AR) coatings to reduce surface reflection losses.
Polarization beam splitters split incident unpolarized light into two perpendicular linearly polarized beams: P-polarized light is fully transmitted, while S-polarized light is reflected at a 45° angle with negligible light absorption. The extinction ratio can exceed 500:1. Our broadband polarization beam splitters support four wavelength ranges covering the visible and near-infrared regions, with two available sizes: 12.7 mm and 25.4 mm.
Product Features
- Superior broadband performance
- Extinction ratio >500:1, 1000:1 (average)
- Low wavefront distortion
Product Specifications
Materials | BK7 grade A optical glass, Quartz glass |
T/R | At a specific wavelength 50/50 ± 5 % R = (Rs Plus Rp)/2 ， T = (Ts Plus Tp)/2 |
Angle of incidence of the incident light | 0° ± 2° |
Outgoing beam deflection | 0° ± 3' (T) ， 0° ± 5' (Right) |
Coating | A polarization beam splitter film is coated on the inclined surface; four outer surfaces are coated with broadband, multi-layer anti-reflection films. |
Surface smoothness | 0.3–3 |
Surface quality | 20/10 to 80/50 |
Aperture for Light Transmission | >90% External dimensions |
Application | Spectrophotometers, interferometers, tunable lasers, and more |
Dimensions, T / R • Incident angle, wavelength range, or other specifications can be customized according to customer requirements. | |
Standard Coating Wavelength
| Narrowband | 532, 632.8, 780, 850, 1064, 1550 nm |
| Broadband | 450–650 nm, 650–900 nm, 900–1200 nm |
Lenses & Window Glass
Lens 
Parameter metrics
Anti-reflection coating: (400–700 nm) R ≤ 0.5%
Metal reflectivity: T ≤ 0.5%
| Serial Number | A (mm) | B (mm) | C (mm) | D | Material |
| 1 | 26 ± 0.2 | 4.6 ± 0.2 | 1.8 ± 0.2 | ￠ 22 | H-K9L (or H-BaK7) |
| 2 | 4 ± 0.1 | 4 ± 0.05 | 1.15 ± 0.2 | ￠ 22 |
Window glass
| A (mm) | B(mm) | C(mm) | PV value | Material | ||
| 1 | 5.0 ± 0.1 | 5.0 ± 0.1 | 0.7 ± 0.1 | Coating on side (532nm, 635nm, 808nm, IR-CUT) | B270 (H-K9L) Soda Lime | |
| 2 | 20 ± 0.1 | 20 ± 0.1 | 1 ± 0.02 | |||
| 3 | 80 ± 0.1 | 80 ± 0.1 | (0.5, 0.7, 1.0, 1.5, 1.7, 2.0, 3.0 mm) ±0.03 | |||
| 4 | 76 ± 0.1 | 76 ± 0.1 | (0.8, 1.0, 1.5, 2.0, 2.5) ±0.03 | |||
| 5 | 60 ± 0.1 | 50 ± 0.1 | 5.6 ± 0.03 | 2.02 | 808nm ±45: R ≥ 98% | H-K9L |
| 6 | 11.6 ± 0.1 | 11.6 ± 0.1 | 2.2 ± 0.03 | AR | ZAB25 | |
| 7 | 5.2 ± 0.05 | 5.2 ± 0.05 | 1 ± 0.03 | 0.02 | Coating MgF2 | Quartz glass |
Changchun New Industries Optoelectronics Technology Co., Ltd.
Address: No. 888 Jinhu Road, High-Tech Zone, Changchun, 130103, P.R.China
International Tel:+86-431-85603799
Email: sales@cnilaser.com
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