The hysteresis compensation for the piezoelectric deformable mirrors can be turned off when operating the mirror with openloop control, which can increase the speed. But that article introduces scanning mirror configuration in mixed mode. Alpao deformable mirrors are based on continuous reflective surface motioned by magnetic actuators. In this paper, an elastic mode method of deformable mirror is proposed to decompose arbitrary wavefront errors of adaptive optics system. Deformable mirror technology development is ongoing at right.
A simple but effective decoupling control algorithm based on zernike mode decomposition for adaptive optics systems with dual deformable mirrors is proposed. Now i know the x and y positions of the object to the concave mirror. Focusing laser beam through pinhole using stackedactuator. Dummy static mirrors which use the same housing and mirror positioning. Have you ever needed a fold mirror in your zemax optical system. In this paper, 97 channel deformable mirror having pzt actuation mechanism is characterized and. Deformable mirrors dm are mirrors whose surface can be deformed, in order to achieve wavefront control and correction of optical aberrations. Research on elastic modes of circular deformable mirror. Phase diversity wavefront sensing for control of space. Fernandez biomedical imaging group, department of optometry and vision sciences, cardiff university, wales, uk. Generic numerical model and corresponding simulations using an accurate zemax model of the micromachined membrane deformable mirror. Deformable mirror dm is the key components of adaptive optics system. How to write a userdefinedsurface of a deformable mirror in zemax.
A zernike mode decomposition decoupling control algorithm. Ideally, the deformable mirror needs to assume a surface shape that is complementary to, but half the amplitude of, the aberration profile in order to compensate for the aberrations and yield a flat wavefront. Single crystal piezoelectric actuators for advanced. There is already an article on how to model a scanning mirror in zemaxs knowledge base. Figure 2 shows a crosssectional view of the deformable mirror architecture we designed for highpower lasers. Spherical aberration correction in aplanatic solid immersion lens imaging using a mems deformable mirror. Over the last several years, mems deformable mirror technology has evolved from a specialized wavefront control device used by only a few select research organizations to a low cost and high performance product that can now be considered for inclusion in certain commercial machines and instrumentation. Extended depthoffield microscopy with a highspeed deformable mirror william j. Deformable mirror how is deformable mirror abbreviated. The linear piezoelectric deformable mirror for femtosecond pulse shaping has 10x50 mm active area, controlled by two rows of 10 actuators each. This device helps advanced users to develop and test their control software. How to write a userdefinedsurface of a deformable mirror in. The elastic modes are derived with an analytical method of linear piezoelectricity based on a bimorph piezoelectric deformable mirror bpdm, and the threedimensional formulas of elastic modes are presented.
Deformable mirror is used for correcting the aberrations of an optical wavefront in adaptive optics. Fortunately, adaptive optics aos, such as deformable mirrors 9 and spatial light modulators 10, have provided a promising. These mirrors are fielded at prominent astronomical facilities. Response time shows how quickly the mirror will react to the control signal. Let us consider the system coordinates of an elliptical plate and denote n the normal to the contour c of the. In adaptive optics the precise control of the wavefront modulation induced by the active element deformable mirror or slm used for correction is an essential step towards fast and accurate correction. Download scientific diagram optical performance modeled in zemax. Dec 12, 2012 have you ever needed a fold mirror in your zemax optical system. High spatialresolution wavefront correctors for next generation applications in astronomy and laser communications. Optimize classic lens designs 18x faster, easier, and with better results. If the pulse is spectrally dispersed onto a linear deformable mirror or other form of. By harnessing the power of opticstudio, opticsbuilder, and opticsviewer, optical, mechanical, and manufacturing engineers can speak the same language across the optical product development process.
Us20170075112a1 method for compensating optical aberrations. This assembly of four actuator modules such as the one at left, with a single polished mirror facesheet and 1764 actuators, is identical to the gen1 dm used to date in testbed experiments. The criterion of focusing efficiency is the fraction of the energy of the laser radiation passing through the pinhole located in the focal plane of the focusing lens. The typical surface figure of the deformable mirror is d e f o r m a b l e m i r r o r s r e v. This advancedlevel article demonstrates how to create a segmented mirror based adaptive optical system using the multiconfiguration capability of opticstudio. Review and cite zemax protocol, troubleshooting and other methodology. This paper is dedicated to highly deformable active optics that can generate nonaxisymmetric aspheric surfacesor freeform surfacesby use of a minimum number of actuators.
The aspheric mirror is obtained from a single uniform load that acts over the surface of a closedform substrate whilst under axial reaction to its. However, the actual range of wavefronts that can be corrected by a particular deformable mirror is limited by several factors. Deformable mirrors are used in combination with wavefront sensors and realtime control systems in adaptive optics. Deformable mirrors adaptive optics deformable mirrors. They feature large strokes, high dynamic motion and an excellent optical quality to meet and exceed your requirments for fast and accurate wavefront correction. This option simplifies the use of the mirror in open loop situations where closedloop operation is not desired or orthogonal shapes need to be generated. Figure 5 optical setup used to thermally load the deformable mirror.
The speed of the deformable mirror is important if you are trying to correct for rapidly changing wavefronts. Multiple applications from astronomy to directed energy weapons available in a wide range of sizes and actuator spacings. I have a mems deformable mirror that i want to implement in zemax. Well suited for an array of applications from in vivo microscopy to highresolution astronomy, the hex deformable mirror architecture has the ability to tip, tilt and piston multiple segments for alternative.
Adaptive optics for laserbeam focusing through the pinhole. Zemax optical design software such that the deformable mirror actuation voltages can be optimized along with all other parameters in the full optical system. To model scanning mirror you first need to place a rectangular volume in your design. Impact of large field angles on the requirements for. Mems deformable mirrors are currently most commonly used in many ao applications given their versatility, the maturity of the technology, and their highresolution wavefront correction capabilities. Output power of the resonator was measured with a flipper mirror placed between the 22% output coupler and the 150 nmi lens and a thermal power meter. Marinan a,benjamin novak a,caitlin kerr a, tam nguyen a, matthew webber b, grant falkenburg a, andrew barg a, kristin berry a, ashley carlton a, ruslan belikov c. In 2006 they found a new use in femtosecond pulse shaping the shape of a dm can be controlled with a speed that is appropriate for. Opticstudio 15 adds speed, capability, convenience, and flexibility to the most widely used optical and illumination design software in the industry. Over the last several years, mems deformable mirror technology has evolved from a specialized wavefront control device used by only a few select research organizations to a low cost and high performance product that can now be considered for inclusion in. The surface of the deformable mirror was imaged onto the wavefront sensor at a magnification of 0.
The typical surface figure of the deformable mirror is download. Opticstudio is an optical and illumination design software tool. Now i want to use a concave mirror to form an image of an point object with a realsize, for example 10nm et al. Mmtlbtvlt large deformable mirror concept these mirrors are composed of 3 basic elements. Micromachined deformable mirrors for adaptive optics. The boston micromachines hex class deformable mirrors offer an alternative to continuous and discrete segmented devices.
Active optics techniques in astronomy provide high imaging quality. Deformable mirrors adaptive optics deformable mirrors alpao. Calibration of deformable mirrors using phase diversity. I have the influence function for each actuator poke to 1um from the shack hartmann wavefront sensor.
Deformable mirrors developed by opc are characterized by. How to write a userdefinedsurface of a deformable mirror. Pdf piezoelectric deformable mirror with adaptive multiplexing. The article discusses the use of stackedactuator adaptive mirrors to improve the focusing of laser radiation. A dummy static mirror can replace your alpao deformable mirror when you must move the dm to a different optical bench. Goldberg,1,4 thomas bifano,2,3 and jerome mertz2,5 1department of physics, boston university, 590 commonwealth avenue, boston, massachusetts 02215, usa 2photonics center, boston university, 8 saint marys st.
Edmund optics specialty mirrors include deformable mirrors, rod or cone mirrors, right angle prism mirrors, or convex spherical mirrors. Boston micromachines corporation is leading the industry in high actuator. Spherical aberration correction in aplanatic solid immersion. Alpao dm meet and exceed requirements for fast and accurate wavefront correction. One of the two deformable mirrors is characterized with a large stroke woofer and the other with high spatial resolutions tweeter. Alpao adaptive optics kits are both readytouse instruments for learning adaptive optics and powerful openarchitecture tools for research.
Goldberg,1,4 thomas bifano,2,3 and jerome mertz2,5 1department of physics, boston university, 590 commonwealth avenue, boston, massachusetts 02215, usa. Example model and session le demonstrating use of a deformable mirror for compensation of spherical aberration caused by a simple planeconvex lens. Oko introduces linear piezoelectric deformable mirror for. We have developed a method to extract the amplitude and phase of the electric field at the entrance pupil of a microscope objective from 3 psf images. Experimentally, i can obtain the image of the realsize object. Micromachined deformable mirrors for adaptive optics thomas bifano a, julie perreault a, paul bierden b, and clara dimas b aboston university bboston micromachines corporation abstract recent progress on deformable mirror systems made at boston university and boston micromachines corporation is described. Figure 2 crosssectional view ofthe deformable mirror architecture. Us9804388b2 method for compensating optical aberrations. Design of adaptive optics based systems by using mems deformable mirror models benjamin potsaid and john tingyung wen. Well be glad to see you at our next exhibitions and conferences. Application of precision deformable mirrors to space astronomy.
Phasics adaptive optics loop can integrate any deformable device. Optimal design of adaptive optics based systems using high. Oko introduces zemax dlls to facilitate realistic simulation of optical systems that include deformable mirrors produced by oko. Zemax will then consider each zernike phase surface in. Deformable mirrors designed by dynamic optics are ideal for high peak power and cw laser because they can be realized with high reflectivity and high damage threshold coating. There are two separate libraries for two mirror classes. A multidisciplinary design and optimization methodology for. Hysteresis and creep are nonlinear actuation effects that decrease the precision of the response of the deformable mirror. The maximum surface deflection is 6 um, the profile difference between the adjacent actuators can reach 3m. Userde ned surface dll for simulation of micromachined.
Edmund optics offers a range of specialty mirrors to be used in a variety of applications or industries, such as illumination, imaging, or microscopy. Our piezoelectric deformable mirrors offer hysteresis compensation when used with thorlabs control software, while the memsbased deformable mirrors are inherently hysteresisfree. Our initial primary concern with this architecture was the preservation of the mirror surface. Aka optics manufacturer of adaptive optics, deformable. For users who prefer to operate our mirror in deflectionspace over voltagespace, we offer an upgrade to our basic control software. Precision deformable mirrors are an enabling technology for that active correction of large optical systems in space. Design fundamentals for force actuation of continuous facesheets s.
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