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Slit-lamp (ophthalmic equipment) usage: slanted strategy, reflective system just after st

Post n°2 pubblicato il 19 Giugno 2014 da electronic11
 

 

 

1. approach of slanted

 

Slit-lamp taking 450 positions, front in the microscope observation, that is essentially the most frequently employed strategy. With slanted method can be observed the majority of the lesions, including proliferation Handheld Portable Slit Lamp of conjunctival nipples, conjunctival follicles, trachoma, corneal scarring, corneal foreign physique pigment and Crystal clouds, Crystal capsule opacification. This process was mostly the modify of colour and verify the relevant section to establish the lesion.

 

2. the reflective system

 

When the slit-lamp shines with eyes met behind the front in the cornea, and Crystal polished surface which include front and rear, reflection will occur. Then turn the microscope bracket, the reflected light enters the microscope, when viewed below the microscope, there's a glimpse of an incredibly bright light. Ahead of and soon after moving the microscope can see micro-reflective surface modifications. In the event you turn the slit lamp along with the components so as to change the angle between the microscope illumination without having microscopes are able to attain the objective of reflected light (Note: it need to focus on the reflective surface from the microscope). This system may be applied to check for corneal edema, corneal surface "grain". Corneal epithelial spalling, corneal ulcers heals scars, colored or reflective mirror of the lens anterior capsule and so on.

 

three. the post method

 

Method of focus with slanted, but at this point the viewer not to look at that mirror clear photos, and turn attention towards the IRIS, resulting inside a blurred spot. Turned with observation spot in front of your IRIS portion with the cornea, corneal lesion seems on the background can be noticed inside the light. When corneal neovascularization, or calm, deep foreign body of cornea, corneal depth corneal vascular blood vessels, the Dhamma, and so on. Such illnesses with slanted technique can't be a definitive diagnosis, this law is usually quickly diagnosed.

 

4. technique of diffuse light lighting

Ophthalmic Slit Lamp

Light the way for this law: fractured lighting systems from a big angle oblique projection, though crack full drive, broad exposure, with centralized light or add frosted glass, with low magnification microscope observation. When normal lighting lighting, and frosted glass, with Dim lighting, it really is difficult to observe subtle lesions. Slit illumination, higher concentration Digital Slit Lamp Microscope  of light, too a lot light, do not go on for a long time. So, which might not add frosted glass, then concentrate the light, even though attempting to decrease the concentrated light time. Such strategies using brightness high concentration of slit light and examined using binocular vision at the same time, so checking is quite practical, comfortable, simple to grasp; parts with the observed morphological integrity, icing around the cake. Its mostly applied for inspection of conjunctiva, sclera, cornea, lens, and also other organizations. For example, this technique converts all of the cornea, Iris, lens surfaces complete of observations, plus the icing, and elastic membrane folds immediately after corneal lens, lens vesicle as well as the elderly get full ideas like nuclear morphology than slanted system is superior.

 

five. adjust the Aperture makes use of

 

Once you adjust the aperture size, may well have cracks of distinct lengths are commonly employed to sweep the eye, taking a look at the ocular involvement. Examine the Crystal may well be acceptable to decrease the fracture, like length, as a way to reduce the glare. Tie front mirror or once you check the back in the fundus speak to lens or vitreous, crack length will have to be shortened. Blue light filter for fluorescence observation, green colour filters Ophthalmic Slit Lamp are made use of for observation of blood vessels.

 
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Answers of stepping motor and General Motors are the different, how to conduct electrical drying processes

Post n°1 pubblicato il 21 Maggio 2014 da electronic11
 

"Student issues" stepper motors and General Motors differ?

 

The "solution" is a high running accuracy and control for stepper motor control of the characteristics of a good system components. In pulse mode, it works, each receiving one or several pulse, motor rotor one position, the distance can be very small.

 

Difference between stepper motors and General Motors Linear Actuator Motor is accept pulses for stepper motor control. Stepper motor * is such a ring distributor of electronic switching device through power excitation winding turns of order connected to a DC power supply. Due to the excitation winding is arranged in some sort of order in space, rotation and DC after the power is switched on, it forms a step change in rotating magnetic field in space, the rotation of the rotor stepping, as pulse frequency increases, the speed increases.

 

Now more commonly used stepper motors including reactive type stepping motors, permanent magnet stepper motors, hybrid stepper motors and single-phase stepping motor and so on. Reactive type stepping motor rotor route made of soft magnetic materials, poly-phase excitation windings on the stator, using magnetically induced changes in torque. At this stage, applications of reactive type stepping motor Gets the most.

 

"The students question" how to conduct electrical drying?

 

"The answer" electrical drying purposes is expelled winding tidal water in, improving insulation, insulation is very low, without drying, powered, easily cause insulation breakdown.

 

Motor dry, there are many ways to generally have two heat-drying and current heating methods. When dry, to control the temperature to avoid overheating, damage the electrical insulation, grade a insulation motor maximum drying temperature of 85 degrees, e-grade insulation should not exceed 95 degrees.

Stepper Linear Motor

Thermal drying Non Captive Stepper Motor method is carried out in electric oven, oven vent at the top for easy draining moisture, most electric oven with automatic temperature control device, to maintain constant temperature. In addition there are other hot drying method, such as infrared.

 

Current heating method is to access current in the stator winding of electrical energy into thermal energy for drying, at the beginning of the current control in the motor rated current should be 20%-30%, and then gradually increased 50%--60%. generally available auto-transformer as power is easy to adjust can also be strung together in several volumes close to the motor, connected to the 220V AC.

 

Drying start, due to tidal heating evaporation,Stepper Linear Motor low insulation resistance, and then gradually increased, elevated resistance more and more slowly, finally on a certain numerical stability. Qualified above the value and stability when the insulation resistance up to 6 hours without constant, the process can be ended.

 
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