The adaptive Shack–Hartmann sensor

Seifert, Lars; Liesener, Jan; Tiziani, Hans J.

doi:10.1016/s0030-4018(02)02351-9

Cited by 81 publications

(33 citation statements)

References 11 publications

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“…Such solution can be applied instead of EDOF elements in order to deal with wavefronts of varying curvature [27], [28]. At last, dynamical range with constant location of the focal spot pattern can be achieved by means of the varifocal HSS implemented on SLM and a varifocal tunable liquid lens in a telecentric relay [29].…”

Section: Adaptive Hartmann-shack Sensormentioning

confidence: 99%

Metaadaptive optics

Martínez‐Cuenca

Durán

Tajahuerce

et al. 2011

2011 10th Euro-American Workshop on Information Optics

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The evolution of the adaptive optical systems (AOS) based on the use of spatial light modulators (SLMs) is outlined as well as their possible lines of future development. A conventional scheme of AOS consists of two basic units, the wavefront sensor and the wavefront compensator. Recently there appeared AOS relying on the use of only one SLM, which is then programmed as to combine these both functions. Further development of AOS implemented on SLMs would involve a preceding or real-time adaptation of their characteristics for correct dealing with different kind of wavefronts. One of such solutions is to introduce the varifocal lenslets into the HartmannShack sensor, what allows to measure wavefronts of significantly different curvature. Another option is to apply defocus resistant elements, e.g., axicons. This proposal can be improved by including the cancellation of local astigmatism by applying elliptical axicons or elliptical zone plates of adequate ellipticity. In general the whole aberration can be divided in a constant part for which the system acts in the open loop mode and closed loop mode for the remaining variable part.

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Section: Adaptive Hartmann-shack Sensormentioning

confidence: 99%

Metaadaptive optics

Martínez‐Cuenca

Durán

Tajahuerce

et al. 2011

2011 10th Euro-American Workshop on Information Optics

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“…Recently, flexible and adaptive arrangements have been introduced in order to improve the sensor performance for steep slopes and strong curvatures of the wavefront 12, 13,14 . The authors improved the dynamic range as well as the measurement accuracy of Shack-Hartmann sensors using LCD-based spatial light modulators to realize the diffractive lens patterns.…”

Section: Wavefront Sensingmentioning

confidence: 99%

ALP: universal DMD controller for metrology and testing

Hoefling¹,

Ahl²

2004

SPIE Proceedings

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The paper presents a current development in the field of high-speed spatial light modulators. The Digital Micromirror Device (DMD) developed and produced by Texas Instruments Inc. (TI) stimulated new approaches in photonics. Recently, TI introduced the Discovery general purpose chipset to support new business areas in addition to the mainstream application of DMD technology in digital projection. ViALUX developed the ALP parallel interface controller board as a Discovery 1100 accessory for high speed micromirror operation. ALP (Accessory Light Modulator Package) has been designed for use in optical metrology but is widely open for numerous applications. It allows for rapid launch into new DMD applications and can be integrated instantly into existing systems or may initiate new developments. The paper describes both, the general hardware architecture and the software concept of the new high-speed controller solution. Binary and gray-value patterns of variable bit-depth can be pre-loaded to on-board SDRAM via USB and transferred to DMD at high speed (up to 6900 XGA frames per second). Three examples are to illustrate how the approach enables advanced applications of DMD technology in metrology, testing and beyond.

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“…Yet, the technical progress of available devices in the past decade has led to a number of new approaches in fields such as comparative digital holography [11], microscopy [12], shear interferometry [13], [14], wave front sensing [15], and phase retrieval [16].…”

Section: Introductionmentioning

confidence: 99%