Light is a kind of electromagnetic wave, electromagnetic wave has the characteristics of amplitude, frequency, phase, etc. Adjusting these three characteristics of electromagnetic wave can express different states, usually called amplitude modulation, frequency modulation and phase modulation.
Optical science is related to many disciplines, including astronomy, various engineering fields, photography, and medicine (especially ophthalmology and optometry, called physiological optics). Practical applications of optics can also be found in a variety of technologies and everyday objects, including lenses, telescopes, microscopes, lasers, and optical fibers.
In various optical applications, if you want to use light to achieve the purpose of application, you need to control the light, including direction, phase and so on. And these adjustment control, need the corresponding adjustment tools. In addition, because the wavelength of light is generally between microns and nanometers, the adjustment of light parameters usually requires very high precision.
CoreMorrow focuses on piezo nanomotion and control systems, providing solutions for high-precision motion control. In the optical path adjustment, which piezo micro-nano motion products from CoreMorrow can be selected?
一
Direction control of Optical Path (Optical Path Deflection)
The direction of optical path refers to the direction of light transmission, and the direction control of optical path refers to changing the direction of light transmission. The following products can be selected to adjust the direction of the optical path.
Piezo tip/tilt stage is used for Fast Optical Path Deflection
CoreMorrow piezo tip/tilt stage adopts differential control mode to drive the internal piezo ceramic to move in the form of push and pull, so that the moving plane of the piezo tip/tilt stage generates deflection motion. It is characterized by fast deflection rate and high deflection resolution, which can be up to millisecond and nanoarc.
CoreMorrow piezo tip/tilt stage can produce θx and θy two axis deflection motion, and Z-direction linear motion can be selected.
The characteristics of piezo tip/tilt stage make it very suitable for the direction control of optical path, and its rapid response, so that it has a very wide range of applications, from scientific research to industry, and to aerospace. For example, the control of the optical path in the laser path stability experiment of scientific research, the control of the optical path in the laser processing of industrial applications, the laser communication in aerospace, the optical path control of image stability and so on.
Models of CoreMorrow Products
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Three-dimensional motion |
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CoreMorrow has provided piezo tip/tilt stage and low power consumption and small volume board card control system for many satellites, including low-orbit satellites equipped with laser communication system, high-orbit satellites equipped with laser communication system, low-orbit satellites equipped with imager, low-orbit satellites equipped with magnetic imager, high-orbit satellites equipped with navigation system and other commercial satellites. CoreMorrow high-reliability piezo tip/tilt stage and drive control products have covered industrial, military and aerospac.
Piezo Deflection Stage is Applied to Optical Path Deflection
The principle of piezo deflection stage is basically the same as that of piezo tip/tilt stage, but the appearance is not quite the same. Piezo deflection stages are specially designed for large area reflective or transmission lenses. It has a central through hole, and the aperture is large, up to 96mm×96mm, can carry the lens size up to 110mm×110mm.
The motion axis of the piezo deflection stage is θx and θy, and the deflection stroke is generally about 2mrad. The piezo deflection stage can also select the Z direction motion. Its motion effect is shown below.
The piezo deflection stage is very suitable for long-range laser beam alignment applications, which can keep the alignment resolution at 0.01 second.
Typical Model
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0~100μm |
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2D Motorized Optical Mounts is Applied to Automatic Optical Path Deflection
The deflection action of the 2D optical mounts is driven by two piezo screws. A common axis center point is adopted between the two axes. The linear motion of each piezo screw controls the deflection Angle and direction of the corresponding axis.
Compared with the piezo deflection stage, the 2D optical mounts has a larger deflection range, but its deflection speed is much slower than that of the piezo deflection stage.
Typical Model
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Piezo Macro - Micro Phase Shifter is used for Optical Path Adjustment
The piezo macro - micro phase shifter is a combination of manual deflection adjustment and linear piezo actuation. The manual deflection part has a variety of adjustment frames to choose from. The linear piezo actuator part is also available in a variety of options, optionally large or small displacement version. For the linear piezo actuator, the displacement of the large displacement version can be up to more than 100 microns, and the small displacement version is about 1μm.
The piezo phase shifter is designed for optical phase shifter applications. Its linear actuation is controlled by voltage, enabling ultra-fast (µs level) stepping adjustment. Meanwhile, the θx and θy axes can be manually adjusted for deflection up to ±4°. The combination of lens adjustment and phase stepping makes it more convenient for optical path adjustment applications such as image movement and interferometry.
Typical Model
Model |
Manual tilt range |
Piezo Linear range |
Driving Voltage |
ZT50M14S7(with sensor) |
±3° |
9μm |
0~150V |
ZT50M14K7 |
±3° |
9μm |
0~150V |
ZT50M14S120 |
±3° |
114μm |
0~150V |
ZT35H80K |
±4° |
3.73μm |
0~800V |
二
Linear Adjustment of Optical Path
Linear adjustment of optical path means that it does not change the direction of light, but only adjusts the path of linear transmission of light, which can change the phase and frequency of light.
PZT Piezo Ceramic Sheet/Stack is Applied to the Linear Adjustment of Optical Path
Piezo ceramic sheets/stacks are relatively small phase shifters, with sizes as small as 1.22×1.3×1.7mm^3. The reflector or transmission lens is attached directly to the piezoceramic sheet/stack.
Driven by voltage, PZT piezo element produces linear motion displacement, which drives the reflective lens/transmission lens to advance or retract in a straight line, thus causing the change of optical path length.
Typical Parameter
Note: CoreMorrow has thousands of piezo models, please refer to the product catalogue or official website for detailed parameters.
The displacement of PZT piezo ceramics is basically linear with the applied voltage. For example, a ceramic that can reach a displacement of 9μm at 150V will produce a displacement of about 0.9μm at 15V drive voltage.
PZT piezo ceramic sheet/stack is suitable for optical path adjustment in confined space due to its small size and high precision. However, once the piezo ceramic is attached to the lens, it can not be disassembled, because the disassembly process will cause damage to the piezo ceramic.
Preloaded Piezo Ceramic Actuator is Applied to the Alignment of Optical Path
Preloaded piezo ceramic actuator is a PZT piezo ceramic element encapsulated inside, and pre-loaded. The structure of the encapsulated piezoactuator not only provides excellent protection for the piezo ceramics, but also allows it to operate at higher frequencies and be used dynamically.
The lens mounting interface of the packaged piezo actuator is also more flexible. The lens can be attached to the lens seat. The lens seat is installed on the moving end of the piezo actuator through the thread, which is easy to replace the lens.
Typical Model
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Note: Please Refer to CoreMorrow Product Catalogue or Official Website for More Products.
Packaged piezo actuators are also available in an annular version with a through hole in the center and are equipped with a lens mounting cap for easier lens installation and replacement. The central through-hole sizes vary from 4.5mm to 24mm in diameter.
Mechanism Amplifier Actuators used for Linear Optical Path Adjustment
The mechanism amplifying actuator is an actuator that amplifies and outputs the displacement of PZT piezo ceramic element. It is suitable for the applications requiring large displacement in optical adjustment. In addition, the piezo actuator can be equipped with a closed-loop feedback sensor, which can linearly control the displacement of the piezo actuator.
Typical Model
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Piezo Fiber Phase Modulator Used for Optical Path Adjustment
CoreMorrow piezo fiber phase modulator is a fiber stretching device, which can stretch the fiber wound in the groove of its outer diameter. The length and frequency of stretching can be adjusted.
When using CoreMorrow fiber phase modulator, please pay attention to the number of winding laps of the fiber to ensure that the output of the piezo fiber phase modulator meets the output requirements of fiber stretching.
Typical Model
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Piezo Macro - Micro Composite Stage Used in Optical Path Adjustment
When the optical fiber is used for optical transmission, the alignment and coupling of two beams will require very high alignment accuracy. CoreMorrow piezo macro micro composite platform can choose 1 to 3 dimensional movement, which is the combination of coarse micrometer and piezo fine tuning.
Typical Model
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Piezo Phase Shifters Used for Optical Path Adjustment
CoreMorrow has dozens of piezo phase shifters, with central aperture from φ36mm to φ310mm and bearing capacity can be up to 25kg. The piezo phase shifters can be upright, upside down, side lying and so on, which are specially designed for all kinds of optical lens testing instruments, production, such as laser interferometer.
CoreMorrow piezo phase shifter produces one-dimensional linear motion with a stroke of more than 12μm. It is driven by direct drive, so it has strong bearing capacity and high stepping resolution.
Typical Model
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Piezo Objective Scanner is Applied to Optical Focusing
CoreMorrow piezo objective scanner is a Z-direction piezo nano-motion stage specially designed for light focusing. It adopts the parallel-steering mechanism with flexure hinge without backslip and has ultra-high focusing stability. The optical path is focused through the object lens, and the position of the focus is adjusted by the piezoelectric objective scanner. The adjustment accuracy can be up to nanometers.
The piezo objective scanner is usually loaded with microscopic detection/measurement or observation device, with a lens loaded for precise positioning adjustment, and can be used with a variety of high-resolution microscopes.
CoreMorrow piezo objective scanner is shown as below.
Typical Model
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Conclusion
The above shows some piezo micromotion products used in optical path adjustment. More optical path adjustment products will be updated continuously.
If you have questions on choosing piezo nanomotion and control products, please contact CoreMorrow, our engineers will recommend psuitable products for you.