With the rapid development of science and technology, optical imaging system has been widely used, and the
performance requirements are getting higher and higher such as lighter weight, smaller size, larger field of view and
more sensitive to the moving targets. With the advantages of large field of view, high agility and multi-channels,
compound eye is more and more concerned by academia and industry. In this work, an artificial spherical compound eye
imaging system is proposed, which is formed by several mini cameras to get a large field of view. By analyzing the
relationship of the view field between every single camera and the whole system, the geometric arrangement of cameras
is studied and the compound eye structure is designed. By using the precision machining technology, the system can be
manufactured. To verify the performance of this system, experiments were carried out, where the compound eye was
formed by seven mini cameras which were placed centripetally along a spherical surface so that each camera points in a
different direction. Pictures taken by these cameras were mosaiced into a complete image with large field of view. The
results of the experiments prove the validity of the design method and the fabrication technology. By increasing the
number of the cameras, larger view field even panoramic imaging can be realized by using this artificial compound eye.
Novel antireflective surfaces with silica particles arranged regularly and tightly are proposed and fabricated by self
assemble silica nanoparticle through electrostatic attraction between charged colloidal particles and charged
polyelectrolyte multilayer. Due to regularly arrangement of the particles, the nanoparticle coatings, as homogeneous
porous layers with uniform distribution, show high-quality and uniform antireflective capability in each region on the
substrate. It has been sufficiently demonstrated in our experiments. Furthermore, the relations among the antireflective
capability, average size of nanoparticles, and incident angle of the irradiated light are calculated by finite-difference
time-domain method. It is demonstrated that the nanostructure coatings with particles of 100 nm size possess the
excellently suitable performance for reflection/transmission with respect to visible-light region. From the results, the
fabricated anti-reflective nanostructures have great potential to improve the efficiency of optoelectronic devices such as a
photo-detector and solar cells.
Silicon is a key material to electro-photonic detectors, which makes the studies of laser induced damage of
silicon significantly important in laser detecting and military applications. The damage characters of silicon under
high-intensity nanosecond laser pulses have been investigated in this paper. The results show that the synergy of thermal,
shock and spectral radiation effects of laser plasma determines the damage characters in silicon. Due to thermal and
shock effects of laser plasma, the material is melt, vaporized, ionized and pushed out in laser irradiated area. This way,
pits are formed and the cool ejected effluents are distributed radially. The interference between scattered and incident
laser can form a periodic structure because of the periodic distribution of thermal stress in particular area. N, O and Si
characteristic spectrum in laser plasma suggests that colored film is the mixture of SiOx:SiNy from laser plasma under repetitive laser pulses.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.