lidar wavelength

and encounters air molecules, dust particles, cloud drops, and other quality points, scattering occurs. However, scattering does not convert radiant energy into heat energy as absorption, but only changes the radiation direction, so that the solar radiation spreads in all directions with the focus of the particle. After scattering, some of the solar radiation cannot reach the ground. If the solar radiation encounters an air molecule with a smaller diameter than the

rapid development of the Internet and the explosive growth of Internet data traffic, it is urgent to expand the network capacity in terms of network connections. Synced optical fiber network (SONET) is unable to withstand the huge traffic volume of the Internet. Dense Wavelength Division Multiplexing (DWDM) technology emerged, and backbone networks will enter the era of all-optical networks in the future. Because the bandwidth of the whole optical ne

physical layer, which is not the same as the "frame" of the data link layer that will be discussed at a later time, and cannot be confused. 3, Wavelength Division multiplexing WDM (Wavelength division multiplexing) Wavelength division multiplexing is the frequency division multiplexing of light. Because of the high frequency of the optical carrier, it is custo

As for the concept of passive optical network, the PON standard based on ATM was proposed in early the 1980s, and the corresponding g.983 suggestion was defined by Itu/fsan, namely Apon. The author also participated in the meeting of the National TNS Optical Devices Working Group at the end of last year, and participated in the review of the communication industry standard of "ATM based passive optical network (a-pon) with 155mb/s burst Optical transceiver Module Technical Requirements". From th

0. PrefaceThere are many different link resources in intelligent Optical network, such as fiber link, wavelength link, various STM link and VC layer link in SDH, and various OTM layer link and och layer link in otn, etc. These links are called Sub dot (SNP) links in Ason, for the scalability of routing protocols and routing diversity, several different SNP links can be combined into sub-dot pool (SNPP) links (These SNP links are called data links in G

participated in the database implementation and operation of Vplex bi-active and ASM double-live, and has a practical experience to talk about the two current dual-activity programs.First, we talk about the main differences between extended RAC and common RAC. Mainly distance, distance is to prevent such as natural disasters, terrorist attacks and other data center damage, another database center can still provide services. However, the distance will bring additional network and IO delay, so th

network in the order of going into the network ), this reduces the latency of data sorting at both ends of end-to-end communication, enabling MPLS networks to serve real-time applications.VII. Optical Router With the rapid development of the Internet and the explosive growth of Internet data traffic, it is urgent to expand the network capacity in terms of network connections. Synced optical fiber network (SONET) is hard to handle such a huge volume of Internet traffic. Dense

wavelengths, optical wavelength groups, optical fibers, etc. In order to make full use of the resources of WDM Optical Networks and meet the needs of future new businesses such as VPN and optical wavelength leasing ), to achieve intelligent optical network, GMPLS also modifies and supplements signaling and routing protocols. To solve various link management problems in optical networks, GMPLS designs a new

Light is a magical form of matter, the photon is composed of photons have both particle and volatility, the wave is a change in the electromagnetic field, we have the universe of non-conductive neutral substances defined as the optical matter.The wavelength of light refers to the distance between the two peaks (or troughs) of an optical wave in the horizontal direction, and the frequency of the light can be understood as the number of peaks (or trough

layer has different refractive index (R1), and its value is usually less than 1% of the fiber core. If the light The angle of incidence less than the critical angle shoots into the core and cladding interface, and the light will be absorbed through the cladding into the coat. The use of optical fiber as a transmission media must be equipped with photoelectric conversion equipment, namely, optical transmitter and optical receiver. The optical transmitter will The encoded data to be sent is co

: Real part: Imaginary part: which And The following describes the meaning of each parameter in the formula, and how to configure the problem "all from the foreigner that translated": Wavelength (λ): Its value is specified in pixels, usually greater than or equal to 2. But not greater than one-fifth of the input image size. Direction (θ): This parameter specifies the direction of the Gabor function parallel stripe, which has a value of 0-360 degr

Overview Advanced Multimode Optical Fiber Verification One-step automated testing allows you to test and verify bidirectional dual-wavelength multimode optical fibers at the same time 75% less time than manual power meter tests Use LinkWare cable management software management and documentation to record test results for copper and Optical Cables FeaturesAdvanced verification of multimode optical fiber networks. you can use CertiFiber to test mo

to the Sun's high sun, people can identify the details of the bright and dark scenes in a scenario at the same time. You must know that the contrast indicated by this brightness and darkness is quite striking. To solve this problem, we must first understand the human eye structure. Human eyes are divided into the retina and the refractive part where the photosensitive cells are located. The human eye adapts to electromagnetic waves with a wavelength

The optical fiber is the abbreviation of the optical fibre, which is composed of fine glass wire about 0.1mm in diameter. It is transparent and slender, although it is thinner than hair, it has a guided wave structure which encloses the light and propagates along the axial direction. Optical fiber communication is due to the mysterious structure of optical fibers developed by the optical wave as the carrier, optical fiber for the transmission medium of a communications mode. At present, the

appropriate cross-section of copper wire to the grounding of the individual wiring, can also be used in the shaft centralized copper or coarse copper wire to the grounding, wire or copper conductor cross-section should conform to the standard. The grounding conductor bell into a tree-like grounding net to avoid forming a DC loop. (5) Integrated wiring of the cable using metal channels or steel pipe laying, channel or steel pipe should maintain continuous electrical connection, and at both ends

monitoring, optical layer protection, and burst light switching. Whether it is an all-optical network or an OEO-based network, the introduction of the new features above enables the DWDM optical network to achieve dynamic wavelength allocation. Their control plane can be built on the network management system, GMPLS, or burst all-optical switch. However, they have similar requirements for optical layer functions. Dynamic

1 Introduction In recent years, the extensive development of IP, Data, video, and other services has quickly consumed optical fiber bandwidth, and the configured wavelength is gradually occupied. The development of services has shown dynamic characteristics. While expanding the capacity of the WDM system, it is bound to convert to the new generation WDM System ULH + ROADM. ROADM (Reconfigurable Optical Splitter) can meet dynamic business needs with it

　　Huaqing Vision LecturerWe know that embedded learning human eyes can see the visible light by wavelength from long to short arrangement, in turn, red, orange, yellow, green, green, blue, purple. The wavelength range of the red light is 0.62~0.76μm; The violet wavelength range is 0.38~0.46μm. The light that is shorter than the violet

　　Huaqing Vision LecturerWe know that human eyes can see the visible light by wavelength from long to short arrangement, followed by red, orange, yellow, green, green, blue, purple. The wavelength range of the red light is 0.62~0.76μm; The violet wavelength range is 0.38~0.46μm. The light that is shorter than the violet wavel