Netclass v5.0 new features:
1)new netclass console
.Easily access the console through the system tray shortcut menu
.Manage students in a list or by thumbnails
.Access features through menus, buttons or a right click
.Manage one, selected or all students
2)show teacher to students
.Show the teacher's screen on the student monitors
."full screen" mode projects the teacher's screen to the entire student screen and locks-out the student keyboard and mouse
."windowed" mode projects the teacher's screen in are-sizeable window on the student computer
.Draw on the screen to highlight important items
3)show student to other students
.Allow a student to take control and demonstrate their screen to the other students in the class
4)thumbnail monitoring
.View up to 16 high color thumbnails at the same time
.Arrange thumbnails to represent a classroom
.Monitor only selected thumbnails*
.Quickly magnify the thumbnail image
.Watch the active application and website as icons on the thumbnail
5)blank student screens
.Grab the student's attention by blanking their screens, showing a custom message and locking out their keyboards and mice
Retail packing : 1 cd 1 card packaged in 1 standard box;
Industrial packing: 45pcs cards packaged in 1 whitebox and 1 cd, 24 whitebox packaged in a carton.
Roof Prism
A roof prism is a reflective optical prism to make two cross beams be parallel with each other. It contains a section where two faces meet at a 90 angle. These two 90 faces resemble the roof of a building, giving this prism type its name. Reflection from the two 90�° faces returns an image that is flipped laterally across the axis where the faces meet.
In some cases, passing through the prism, the image is both deflected right-to-left and top-to-bottom. The hypotenuse of the prism utilizes total internal reflection (TIR) to reflect the image through the prism. Polarization states may become rotated during reflection.
As a rich experienced manufacturer, substrate material in Photonchina can be chosen from all optical glasses (N-BK7, for instance), Fused Silica, Si, ZnSe, ZnS, CaF2, MgF2 etc.
Cube beamsplitters are constructed by cementing two right angle prisms together with the appropriate interference coating on hypotenuse. The absorption loss to the coating is minimal. Transmission and reflection approach 50% (average) though the output is partially polarized.
A quarter-or half-wave retarder made from two plates of quartz with their fast axes crossed; the difference in thickness between the two plates determines the retardance. Zero-order retarders provide accurate retardance over a broad range of wavelengths and dance over a broad range of wavelengths and are more durable than single-element retarders.
Cemented zero-order waveplates
Cemented zero-order waveplate is constructed of two multi-order waveplates with their axis crossed. Thus, it performs as a zero-order waveplate because of the effect of two plates counteracting each other. It has wide temperature bandwidth and wavelength bandwidth properties. Because it is cemented, the dama zge threshold must be considered (about 10mw/cm2) when used.
Key features:
- double plates
- broad spectral bandwidth
- wide temperature bandwidth
- ar coated
Waveplates, also known as retardation plates, are optical element having two principal axes slow and fast, that resolve an incident polarized beam into two mutually perpendicular polarized beams. The emerging beam recombines to form a particular single polarized beam. Retardations plates produce full, half, quarter and octadic-wave retardations.
Low order waveplates
The properties of low order waveplates are much better than the multi-order wave-plates because of its thinner thickness (less than 0.5mm). Better temperature (38), wavelength (1.5nm) and incident angle (4.5�) bandwidth and high damage threshold make it widely used in common application. Also it is economical.
Key features:
-thickness: 0.2-0.5mm
-high damage threshold
-better temperature bandwidth
-low cost
Technical capability
Material:crystal quartz
Dimension tolerance:+0.0, -0.1mm
Wavefront distortion:/8
Retardation tolerance:/500
Wavelength range:240-2100nm
Parallelism:< 1 arc second
Surface quality:20-10 scratch & dig
Coating:ar/ar coating, r < 0.2% on both surface at central wavelength
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The true zero order waveplate means that the thickness of waveplate is very thin (less than 0.1mm) which make the true zero order waveplate excellent in temperature, wavelength and incident angle (about 20) bandwidth. Therefore, it is excellent choice for the highly accurate application. It is cemented with a block of glass which is limited to low and medium power application.
Key features:
- broad spectral bandwidth
- wide temperature bandwidth
- wide angle bandwidth
- cemented by epoxy
Technical capability
Material: Crystal quartz / bk7 optical glass
Dimension tolerance: +0.0, -0.1mm
Wavefront distortion: 8 @ 632.8nm
Retardation tolerance: 500
Wavelength range: 400-2100nm
Parallelism: < 1 arc second
Surface quality: 20-10 scratch & dig
Coating: Ar/ar coating, r < 0.2% on both surface at central wavelength
Cylindrical lenses are either plano-convex or plano-concave in form and rectangular in shape. These lenses are used in applications requiring magnification only, such as in transforming a point image into a line image or changing the height of an image without changing its width or vice versa. Therefore serves a variety application, such as slit line detector array illumination, bar code scanning, holography, optical information processing and computer, laser projection.
Capability
Material: optical glass, fused silic
Dimension: 1 - 500mm
Dimension tolerance: + / - 0.02mm
Centration: 3 arc minutes
Wedge: < 5 mrad
Surface quality: up to 10-5
Surface accuracy: x -4
Clear aperture: > 90%
Coating: according to the requirement
Item no.:et640
Dimension:8.5*1.8*8.0cm
Packing:40pcs/ctn
Carton meas.:27.5*21.0*20.0cm
Functioncount down / up
Negative display
Magnet & stand at back
1xaaa battery excluded
Item no.: et522ar
Size:8x3.5x8cm
Packing:40pcs/ctn
Meas.:40.5x25x22.5cm
Function:
Time (12/24h)
Temperature (c/f)
Day&date& month
Blue led backlight
Countdown timer(23:59~00:00)
Alarm & snooze
Power comsumption:3xaaa batteries excluded
1xusb cable included
Corner Cube Prism is also called Retroreflector or Trihedral Prism. In the Corner Cube Prism, three reflecting surfaces are perpendicular to each other, like the side wall of the cube. The input surface is perpendicular to the cube diagonal. Disregarding the angle of incidence, the output beam is parallel to the input one, but it is of opposite direction. Inset of the several corner prisms, for better matching, their entrance-exit surface is often hexagonal. In case of this prism the phenomenon of full internal reflection occurs so it is not necessary, (however it is possible) to put mirror coating on the reflecting faces. Normally the reflection surfaces are Al reflection coating, and then covered with Cu and Black Painting.
Note for corner cube retroreflector:
(1). Besides N-BK7, custom-made corner cube Prisms made of other optical materials are available.
(2). Corner Cube Prisms with lower deviation tolerance, such as 1, 30, or 10, are available.
(3). Corner Cube Prisms with better surface Quality (better than 40/20 or 20/10) are available.
(4). HR or Metal reflection coating(Al, Ag, Cu, etc.) on reflection surfaces is available.
(5). AR coating on input/output surface is available upon request.
(6).Custom-made non-standard Corner Cube Prisms at any other size are available upon request.
The rock drill is a kind of high efficiency air leg rock drill machinery. It is mainly used for diging into mine laneway and blasting holes in all drilling works. It is indispensably importance machine tool in metallurgy, coal, railway, traffic, water conservancy construction and national defence stone project.
It is suitable for drilling and blasting under various of rocks at any direction angles. Blast hole dia is 34-42mm,drill hole depth is 5 m This machine may match with Model FT160BD short air leg or Model FT160BC long air leg.
This machine has transparent surface of FY200B oil reservoir, easy to observe the oil lever, adjust oil quantity, ensure the well lubricated.
Wooden case
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