Spherometer
Product Details:
- Usage Laboratory
- Material Metal And Brass
- Color Silver And Golden And Black
- Product Type Spherometer
103 INR/Piece
X
Spherometer Price And Quantity
- 103 INR/Piece
- 1 Piece
- High Precision Thread
- Individual box packaging
- Brass/Metal
- 0.01 mm
- Metal
- Measurement of curvature of lenses and spherical surfaces
Spherometer Product Specifications
- Laboratory
- Spherometer
- Metal And Brass
- Silver And Golden And Black
- High Precision Thread
- Individual box packaging
- Brass/Metal
- 0.01 mm
- Metal
- Measurement of curvature of lenses and spherical surfaces
Spherometer Trade Information
- Cash in Advance (CID), Cash Advance (CA)
- 1000 Piece Per Week
- 1 Week
- Yes
- Sample costs shipping and taxes has to be paid by the buyer
- South America, Eastern Europe, Western Europe, Middle East, Central America, Asia, North America, Australia, Africa
- All India
Product Description
Calibrating the Spherometer
To calibrate (zero) the spherometer, you place the 3-legs (or rim of the cone in the cone type) onto the flatness reference. Insert the depth probe of the calipers through the center hole of the fixture, as if to measure the depth from the top of the fixture to the reference surface, and push the "zero" button to set the digital calipers to read zero at that depth. You can also zero to a lens of known precision curvature, and add the corresponding depth to subsequent measurements.
Measuring Spherical Curvature with the Spherometer
To measure a convex curvature, you probe the depth again with the digital calipers, this time to the subject lens surface from the top of the fixture, and record this distance. The radius of curvature is then R = r^2/2h + h/2, where r is the radius of the bolt circle (tips of the screws in the 3-leg design, or radius of the rim in the round type), and h is the depth measurement.
The bolt-circle diameter on the 3-leg spherometer is adjustable between 3 selections of 15mm, 30mm, or 50mm. To change the diameter, you simply remove the screws from one set of holes and insert them in the other. For best accuracy, you should use the largest diameter that is still smaller than the lens being measured. I chose 50mm as the largest size because that is about the largest diameter of lenses I work with. The design scales proportionately to larger sizes if needed.
Measuring a concave curvature is similar, except you may need to manipulate a small ball bearing of known diameter between the caliper depth probe and concave surface.
The instrument also allows quick comparisons of lenses by setting the curvature depth of one lens to zero on the calipers, and then probing other lenses.
To calibrate (zero) the spherometer, you place the 3-legs (or rim of the cone in the cone type) onto the flatness reference. Insert the depth probe of the calipers through the center hole of the fixture, as if to measure the depth from the top of the fixture to the reference surface, and push the "zero" button to set the digital calipers to read zero at that depth. You can also zero to a lens of known precision curvature, and add the corresponding depth to subsequent measurements.
Measuring Spherical Curvature with the Spherometer
To measure a convex curvature, you probe the depth again with the digital calipers, this time to the subject lens surface from the top of the fixture, and record this distance. The radius of curvature is then R = r^2/2h + h/2, where r is the radius of the bolt circle (tips of the screws in the 3-leg design, or radius of the rim in the round type), and h is the depth measurement.
The bolt-circle diameter on the 3-leg spherometer is adjustable between 3 selections of 15mm, 30mm, or 50mm. To change the diameter, you simply remove the screws from one set of holes and insert them in the other. For best accuracy, you should use the largest diameter that is still smaller than the lens being measured. I chose 50mm as the largest size because that is about the largest diameter of lenses I work with. The design scales proportionately to larger sizes if needed.
Measuring a concave curvature is similar, except you may need to manipulate a small ball bearing of known diameter between the caliper depth probe and concave surface.
The instrument also allows quick comparisons of lenses by setting the curvature depth of one lens to zero on the calipers, and then probing other lenses.
Versatile Tool for Surface Curvature Measurement
A spherometer is indispensable in laboratories and optical workshops where precise determination of curvature for lenses and spherical surfaces is needed. Its sturdy metal and brass structure withstands frequent use, making it a dependable option for scientists, engineers, and students engaged in metrology, optics, or related research.
High Precision and Easy Readability
Equipped with a centrally threaded high-precision screw and ultra-fine scale graduation of 0.01 mm, the spherometer enables users to obtain highly accurate measurements. This level of detail ensures consistent results and is particularly valuable when working with small or delicate convex or concave surfaces in scientific experiments and quality control.
FAQs of Spherometer:
Q: How does a spherometer measure the curvature of a surface?
A: A spherometer determines the curvature of a lens or spherical surface by measuring the sagittathe height difference between the center and the reference plane established by its three fixed legs. Using its precision central screw and finely graduated scale (0.01 mm graduation), you can obtain the necessary measurements to calculate the radius of curvature using mathematical formulas.Q: What materials are used in the construction of the spherometer?
A: The spherometer is primarily constructed using metal for the frame and brass or metal for the legs, ensuring durability and stability during repeated laboratory use. The central screw features a high-precision thread to guarantee smooth and accurate adjustments.Q: Where is a spherometer typically used?
A: A spherometer is commonly used in laboratory environments for research, education, or quality control. It is particularly useful in optics laboratories to measure curvature for lenses and mirrors, but it also finds application in mechanical and materials engineering.Q: What benefits does the scale graduation of 0.01 mm provide?
A: The fine scale graduation of 0.01 mm allows users to take accurate, detailed measurements of spherical surfaces. This increases the reliability of test results and is crucial in experiments or manufacturing processes that demand high precision, such as lens crafting or scientific investigations.Q: How do you ensure accurate readings with a spherometer?
A: To guarantee accurate readings, ensure the spherometer is properly placed on a clean, smooth surface, and use the central precision screw carefully. Read the scale graduation at eye level and calibrate the instrument if required before taking critical measurements.Tell us about your requirement
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Contact Details
- 4537/1 A, Bldg. 13, Deepak Market, Ist Ambala - 133001, Haryana, India
- Phone : 08045478393
- Export Import Code (IEC code) - 3312001811
SSI No. - 060021100476
- Mr Saahil (GENERAL MANAGER)
- Mobile : 08045478393
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