• Product Name: BL-2000A Crack Lamp Microscope
• Order number: tlyon000425
• Brand Name: Shanghai Expo

If you find that the product information is inaccurate, please feel free to correct it; For inquiries about related categories and brand products, please contact us

Classic design, awarded99Gold Award at the International Medical Equipment Fair in Paris, France

Performance of Micro Mirror System	Microscope type	Intersection angle stereoscopic format
	Variable magnification method	Objective lens with two adjustable settings
	eyepiece	10x
	Total magnification and field of view	16×（φ14.5mm）The10×（φ18）
	Distance adjustment range	52mm ~ 80mm
	Range of diopter adjustment	+5D ~ -5D
base	Move left and right	110mm
	Forward and backward movement	90mm
	Move up and down	30mm
Eto bracket	Move up and down	80mm
	fixation lamp	redLED
Lighting system performance	Crack width Spot diameter	0 ~ 10mmContinuing Adjust(10mmAt that time, the cracks were circular in shape) Ф10mm、Ф3mm、Ф1mm、Ф0.2mm
	Filter	Insulation sheet, non red sheet, cobalt blue sheet
	light bulb	12V 50Whalogen lamp
power supply	rated voltage/Rated frequency/Input power	220V/50H/68VA
Weight and size	Gross weight/net weight	13kg/11kg
	Outer box volume	455mm(Long)× 385mm(Width)× 630mm(High)

The function of slit lamp
When using diffuse illumination, the collection of light and low magnification can provide a comprehensive observation of the cornea, iris, and lens.
When using direct focal illumination, the curvature and thickness of the cornea, the presence of foreign bodies and corneal posterior deposits (KP), as well as the level and morphology of lesions such as infiltration and ulceration can be observed; When the focus is pushed back, the cloudy part of the crystal and the lesion in the anterior one-third of the vitreous body can be observed; If conical light is used, it can detect the floating particles in the room water.
When using the mirror reflection irradiation method, one can carefully observe the subtle changes in the anterior and posterior corneal and lens anterior and posterior capsules, such as shedding cells on the tear film, patterns on the corneal endothelium, patterns on the lens anterior and posterior capsules, and patterns on the adult nucleus.
When using the posterior reflex irradiation method, corneal epithelial or endothelial edema, corneal posterior deposits, neovascularization, mild scars, and crystal vacuoles can be observed.
When using the corneal illumination method, extremely faint opacities such as opacities, blisters, perforations, scars, etc. can be observed on the cornea.
When using indirect illumination, it is possible to observe the pupillary sphincter, internal bleeding of the iris, iris blood vessels, corneal vascular opacities, etc. At the same time, the slit lamp microscope can also be equipped with a front mirror, contact lens, and three sided mirror, which can be used to examine the peripheral retina, anterior chamber angle, and posterior vitreous body. Through binocular observation, stereo vision can be generated.
So, through slit lamp microscopy, contraindications for wearing soft corneal contact lenses can be identified, and appropriate soft corneal contact lenses can be selected for the wearer
Mirror.

How to repair crack lamps

1. Change the light source
Light source damage: First, replace the light source according to the specifications required in the manual. The light source of the instrument is mostly halogen lamps, but don't think that simply replacing a new light source is enough. Be sure to position the filament at the center of the light path. The inspection method is: after installing the lamp, slightly move the position of the lamp back, forth, left, and right to observe the condition of the crack. When the crack is illuminated most evenly and brightly, fix the light source.
2. If the microscope eyepiece lens is stained with dust and oil due to long-term use: you can first use a rubber nozzle to blow off the dust and then wipe it clean with lens paper. If there is still oil stains, you can wipe it with anhydrous alcohol.
3. The illumination system and the microscopy system are not on the same axis: there may be rotating crack arms or microscopic arm crack images that run out of the microscope field of view or cannot be in the center of the field of view. Taking the TLX-II slit lamp microscope produced in Suzhou as an example, the repair method is to insert the focusing rod and find the barrel of the illumination system with a 450 reflector on the top. There are four fastening screws on the lower outer wall of this barrel, which can be loosened and gently rotated to make the slit light shine on the center of the focusing rod. Then tighten the screws and rotate the slit arm to see that the slit image always appears in the same position on the rod, which is the required coaxial focusing.
4. Cracks with burrs or not located in the center of the circular aperture: Generally, cracks and adjustment handwheels are installed together. To eliminate these two types of faults, it is necessary to remove this part as a whole. If there are burrs in the cracks, it is usually caused by dirt sticking to the crack pieces. Clean and remove the dirt. When cleaning up dirt, be sure not to use lens paper or cotton with hair. Instead, use clean and smooth paper or specialized wiping cloth for resin lenses and CD discs. If the crack is not in the center when observed through a microscope, it can be achieved by adjusting the position of circular disks of varying thicknesses on the spiral axis that adjust the size of the crack. When the crack imaging is above or below the microscope and not in the center, the horizontal adjustment screw of the microscope can be adjusted to make the crack appear in the center of the microscope screen.
5. The size of the crack cannot be fixed: The crack is composed of two equal blades, and a spring is installed between the two blades to close them. The size of the crack is achieved by adjusting the uneven thickness of the discs sandwiched between the cracks as mentioned earlier. The thicker the corresponding thickness, the wider the crack, which means that except for the thinnest part (i.e. when the crack is closed), the size of the crack spiral is always subject to a rotational force that causes it to turn towards the closure of the crack. To fix the size of the crack, manufacturers usually add a felt pad on the inner wall of the knob, with a compression spring on the outside. The felt pad rubs against the instrument wall to prevent it from rotating on its own. So, when the size of the crack cannot be fixed, simply tighten the spring pressing on the felt pad. If this method does not work, you can remove the knob and replace it with a thick felt pad to ensure that the gap width is fixed.

Usage
1. Oblique illumination method
The most commonly used method for observing the fissure system is to take a 45 degree angle, position the basin, and observe it from the front with a visible microscope. Most of the anterior eye lesions can be observed using oblique illumination, such as conjunctival papilla proliferation, conjunctival follicles, trachoma scars, corneal foreign bodies, corneal opacities, anterior capsule pigments, and lens opacities. This method mainly examines changes in the color and shape of the eyes to determine lesions.
2 Reflection method
When the slit lamp shines into the eye and encounters smooth interfaces such as the front and back of the cornea, the front and back of the lens, reflection will occur. At this point, if the microscope stand is rotated to allow the reflected light to enter the microscope, one eye will see a bright reflection when observing with the microscope. Moving the emblem display mirror forward and backward can clearly see the subtle changes on the reflective surface. If the angle between the slit lamp and the microscope is rotated to change the illuminated area without moving the microscope, the purpose of reflecting light can also be achieved (note: the microscope must be focused on the reflective surface). This method can be used to examine small blisters on the corneal surface, corneal epithelial peeling, scars from corneal ulcer healing, wrinkles in the anterior capsule of the lens, and reflections or colored reflections in the posterior capsule of the specimen during corneal edema.
3. Rear illumination method
The focusing method is basically the same as the oblique illumination method. But at this moment, the observer does not look at the clearly illuminated area and turns their gaze to the other side of the field of view. For example, when the slit light shines on the person from the right, the microscope focuses on the cornea, and the slit beam passes through the cornea to reach the iris, forming a blurry slit spot; Turning your gaze to the corneal area in front of the iris spot, you can see the corneal lesion appearing on a bright background. When the cornea has new blood vessels or opaque tissues such as posterior sediments, opaque points or lines will appear on a bright background. This method is applicable to the examination of posterior corneal deposits, deep corneal foreign bodies, deep corneal blood vessels, corneal vascular grids, etc.
4. Adjust the aperture method
By turning the crack rotation handle to the left or right, the crack can be rotated from a straight position to a horizontal position. When using a horizontal crack for optical sectioning, the slot of the crack lamp should be placed in the center position, so that the angle between the crack lamp arm and the microscope is... When adjusting the aperture size, different lengths of slit images can be obtained. Long slit images are generally used to sweep the eye and observe eye lesions comprehensively. When inspecting the crystal, the length of the crack image can be appropriately shortened to reduce glare. When performing fundus or posterior vitreous body examination in conjunction with a front or contact lens, the length of the fissure image should also be appropriately shortened. The blue filter is commonly used for fluorescence observation, while the green filter is used for observing blood vessels.

maintenance
1. Crack lamp microscope is a precision instrument. Generally, the instrument should be placed indoors with good ventilation, dry environment, and relative difficulty not exceeding 50%, otherwise it will have adverse effects on the metal parts coating and optical parts surface of the instrument.
The optical lens of the slit lamp emblem display mirror is the key to ensuring the normal use of the instrument and must be kept clean regularly When the lens is contaminated with dust, the dust can be gently brushed off with the dust brush included in the random spare parts; If the lens has oil stains You can use defatted cotton with 60% alcohol and Diao Gently wipe the mixture of ether Remove oil stains
3. The surface of optical lenses should be avoided from contact with hands and other parts of the human body, as sweat and oil on the human body can directly affect the quality of the surface of optical components; If contact is not made due to improper operation Just wipe it clean in time To ensure that the lenses can be used for a long time.
4. The rolling mirror of the instrument is prone to dust accumulation, so the lamp cover and lamp holder can be removed. Gently brush off the dust with a dust brush to ensure the light source quality of the instrument during normal operation
5. The outer part of the pivot frame on the motion base of the instrument should be wiped clean regularly And evenly apply a very thin layer of lubricating oil to keep it smooth; Otherwise, it is easy to rust or get dirty, which directly affects the flexible operation of the instrument.
6. When the instrument is twisted The fastening bolts on the motion base, slit lamp bamboo, and emblem display mirror should be tightened to prevent the instrument from leaving the guide rail or losing its center of gravity during transportation Smash the instrument. The instrument should loosen these three bolts during normal use.
After using the instrument, it should be promptly covered with the dust-proof outer leather of the instrument To prevent the instrument from being contaminated with dust and dirt.
8. Instruments and spare optical components (or accessories) should be stored in dry wings containing desiccants.
9. Before using the instrument, please indicate whether the local power station meets the requirements for the use of this instrument.