CoreMorrow has been in specialized in research and development, design, processing and production of piezo tip/tilt platform for 16 years. We have very rich experience in the design and production and have solved a variety of parameters and the use of environmental problems for users.
Today we introduce a high performance, high reliability, industrial and aerospace grade S37 series piezo tip/tilt platform.
Piezo tip/tilt platform is one of CoreMorrow piezo motion products, which can produce one-dimensional or multidimensional deflection motion, such as rapid deflection motion in θx, θy axis, it is widely used in optical communication, image stabilization, optical path regulation, laser processing, laser beam combination and other fields.
S37 series piezo tip/tilt platform has T2, T3, T4, T5, T6, T8 and other versions, the travel range increases successively, from 2.5mrad to 13.5mrad. S37.T8 has a deflection travel range of 13.5mrad. Due to its anti-vibration design, its reliability and dynamics are also very good, which solves the problem of low dynamics of piezo tip/tilt platform under large travel.
Characteristics
• High reliability
• Anti-vibration design
• Full closed loop, high precision
• Optional open/closed loop
• Industrial grade/Military grade/Aerospace grade
Application
• Image processing/stabilization
• Interleaved scanning, jitter
• Light filter/switch
• Scanning microscopy, etc
• Laser scanning/beam deflection and stabilization
• Optics
In general, with the same shape and diameter is the same, the larger the stroke of the piezo tip/tilt platform, the longer its length. On the basis of increasing the length, the reliability of piezo tip/tilt platform will decrease. However, many applications have higher and higher requirements on the reliability, which is difficult for many standard products to meet. In order to solve this problem, CoreMorrow adopts seismic reinforcement and full closed-loop method to achieve optimal reliability and accuracy, and has passed the third-party vibration resistance test.
The function of S37 series piezo tip/tilt platform is to drive the speculum to produce fast The function of S37 series piezo tip/tilt platform is to drive the speculum to produce fast deflection motion, deflection response speed up to millisecond magnitude, deflection accuracy in nanoarc magnitude, which is common galvanometer, voice coil motor can not reach. These characteristics make it very suitable for fast steering adjustment of optical path.
S37.T8 piezo tip/tilt platform, θx, θy two axis motion
Structure
S37 series piezo tip/tilt platform can produce θx and θy two-axis deflection motion. It is based on parallel kinematic design, with coplanar axis and moving surface. The four piezo actuators are placed equally at 90°angles and distributed in pairs of differential control. Two pairs of differentially driven piezo actuators provide the highest attainable angular stability over a wide range of temperatures. Its yaw motion is realized by two pairs of piezo actuators in push-pull mode and controlled by a bridge circuit.
Full Closed-Loop, Higher Precision
High stability and positioning accuracy is achieved by using absolutely measured sensors at suitable locations in the execution of the drive structure. They provide high bandwidth and feedback to the controller electrical signals representing the position information. The sensors are connected in a bridge configuration to eliminate thermal drift and ensure superior stability.
Examples of Voltage vs Displacement Curves
Technical Data
S37.T2、S37.T3
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(0~120V) |
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(0~150V) |
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S37.T4、S37.T5
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(0~120V) |
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(0~150V) |
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S37.T6、S37.T8
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Third Party Environmental Test Report
S37 piezo tip/tilt platforms have passed the environmental test report conducted by the third party, including S37.T8S/K with the largest displacement and longest volume in the S37 series, which fully proves the high reliability and high vibration resistance of S37.
Piezo Tip/tilt Platform Application
• Satellite Laser Communication
The main function of piezo tip/tilt platform is to deflect the loaded lens. Its application is mainly to adjust the direction of light. An outstanding advantage of piezo tip/tilt platform is that the angle adjustment accuracy is very high, which can be less than 0.01". Since the deflection angle is small and the deflection motion precision is high, it is very suitable for the adjustment of long distance optical transmission direction, such as satellite laser communication. Signal transmission communication between satellite and ground is very difficult to achieve, the reason is that the divergence angle of the beam is very small, very difficult to align, so satellite laser communication needs a very high precision aiming system.
For the current star link construction, the piezo tip/tilt platform is also needed to complete the accurate alignment of optical path.
• Light Path Stabilization
In the process of light transmission, the optical path will be unstable due to various external interference or environmental factors, which is very unfavorable for optical communication or imaging applications. In order to eliminate or compensate the instability or deviation of the optical path, CoreMorrow piezo tip/tilt platform can be used for rapid and high precision adjustment and compensation. To adjust the deflection of optical path in a very short time is one of the essential factors for the successful application of piezo tip/tilt platform.
CoreMorrow can also provide scientific users with the laser stability experiment of the entire laser stability system, including laser, piezo tip/tilt platform and control system, PSD position signal detector, spectral, optical machinery, etc.
The basic principle is, after interference with piezo tip/tilt platform and compensation with piezo tip/tilt platform reflection, the laser beam is received by the PSD optical signal position sensor, and feedback to the compensation with piezo tip/tilt platform controller, through its internal deviation comparison circuit calculation, output compensation voltage, compensation with piezo tip/tilt platform angle adjustment, the interference signal compensation, attenuation.
The interference signal of CoreMorrow piezo tip/tilt platform can be reduced to less than 5 microns after closed-loop compensation under the interference signal of 150 microns and 10Hz in the X or Y direction.
• Optical Imaging System
In the process of optical imaging, the optical axis of the camera will be offset due to various influencing factors such as platform vibration and attitude random disturbance, so that the target moves relative to the focal plane and generates image shift on the focal plane, then caused the imaging fuzzy problem. For example, in the terrestrial astronomical observation, the random jitter of the focal plane image of the telescope will be caused by atmospheric turbulence and telescope jitter, which greatly reduces the spatial resolution of the telescope.
The most effective scheme to suppress beam jitter is to use the fine tracking ring in the capture, tracking and pointing (ATP) system to compensate. Piezo deflection system is the preferred actuator because of its good stability, low energy loss, high mirror reflectivity, high deflection resolution and fast deflection speed.
• Rapid Laser Machining
For machining aperture and hole distance accuracy requirements are very high, such as a few microns to hundreds of microns, dozens of microns, using the precise direction control of laser and its fast response speed and other characteristics of CoreMorrow tip/tilt platform, can completely solve the problems like the small hole processing accuracy is low, and aperture is not smooth, etc.
The piezo tip/tilt platform is integrated in the ultrafast laser processing application involving micrometer small holes, which has the characteristics of high machining precision and fast machining speed. It has been widely used in micro - hole machining and special-shaped hole machining of various devices.