Homodyne scanning holography.
نویسندگان
چکیده
We have developed a modified version of a scanning holography microscope in which the Fresnel Zone Plates (FZP) are created by a homodyne rather than a heterodyne interferometer. Therefore, during the scanning the projected pattern on the specimen is frozen rather than varied as previously. In each scanning period the system produces an on-axis Fresnel hologram. The twin image problem is solved by a linear combination of at least three holograms taken with three FZPs with different phase values.
منابع مشابه
Simplified architectures with homodyne detection for high capacity Lippmann data storage
Lippmann storage systems are close to holographic memories: binary data are encoded as pixels on an image beam by means of a spatial light modulator. This data page is imaged into the plane of a mirror set beneath the recording medium. Conversely to holography, the image beam interferes with its reflection onto this mirror, and not with an external reference beam [1-3]. These interferences reco...
متن کاملHomodyne detection of holographic memory systems
We present a homodyne detection system implemented for a page-wise holographic memory architecture. Homodyne detection by holographic memory systems enables phase quadrature multiplexing (doubling address space), and lower exposure times (increasing read transfer rates). It also enables phase modulation, which improves signal-to-noise ratio (SNR) to further increase data capacity. We believe th...
متن کاملHomodyne Detection of Data Pages in Lippmann « Holographic » Memories
1. Lippmann data storage Lippmann interference architectures are alternatives to holographic memories for high capacity data storage [1-3]. In these systems, the image beam carrying the information data interferes with its reflection onto a mirror. The resulting interference pattern thus records a grating in the light sensitive material. Several images can be wavelength multiplexed at the same ...
متن کاملApertureless scanning near-field optical microscopy: a comparison between homodyne and heterodyne approaches
In coherent homodyne apertureless scanning near-field optical microscopy (ASNOM) the background field cannot be fully suppressed because of the interference between the different collected fields, making the images difficult to interpret. We show that implementing the heterodyne version of ASNOM allows one to overcome this issue. We present a comparison between homodyne and heterodyne ASNOM thr...
متن کاملOn the fundamentals of optical scanning holography
Optical scanning holography is a real-time holographic recording technique in which holographic information about a three-dimensional 3D object is acquired using a single two-dimensional active optical scan. Applications of the technique include optical scanning microscopy, pattern recognition, 3D holographic display, and optical remote sensing. This paper introduces the basics of optical scann...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics express
دوره 14 10 شماره
صفحات -
تاریخ انتشار 2006