LINK HLM-200

Ten prism dioptres, measured without a single accessory

The LINK HLM-200 is an outer reading focimeter built on an upright column. Its shuttle lens measures across ten prism dioptres in single dioptre steps, dioptric power runs from minus 25D to plus 25D, and lenses of up to 100mm diameter are accepted through a wide observation field.

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Lensmeters

Prism Measurement Without Accessories

Direct measurement across 10 prism dioptres in single dioptre graduations covers a great deal of the prismatic work an optical practice sees. Because that range is available without fitting anything, the instrument handles prism prescriptions as ordinary work rather than as a case requiring preparation. For practices managing binocular vision anomalies, the absence of a setup step means prism gets verified as routinely as sphere and cylinder do, which is precisely when it is most reliably done.

Verification of Large Modern Lenses

A maximum measured diameter of 100mm accommodates the larger lens shapes now common, including generously sized frames and uncut blanks. Instruments with tighter diameter limits force awkward handling or leave certain work unverified. Combined with the wide field of vision, larger lenses are seated and read without the operator fighting the instrument to get a usable view of the target.

Teaching Optical Measurement Directly

For training purposes an instrument where the student aligns the target and reads a graduated external scale makes the measurement itself visible. Sphere, cylinder, axis and prism become quantities observed and recorded rather than figures that simply appear. The adjustable eyepiece allows a succession of students with differing eyesight to work at the same instrument comfortably, which shared teaching equipment must accommodate.

Dependable Second-Position Checking

An optical instrument with no electronic interpretation provides verification capability that stays available and behaves predictably. Practices wanting a checking position that does not depend on a powered bench unit, or somewhere to verify work away from the main dispensary, are well served by an upright column instrument that needs little beyond a level surface and an operator who knows how to read it.

Generous Prism Range as Standard

Ten prism dioptres measured directly, in single dioptre graduations, is a substantial prismatic range to have available without fitting an accessory. The practical consequence is behavioural rather than technical: capability that requires no preparation gets used, while capability that requires fetching and fitting something tends to be skipped when the bench is busy. Prism that is easy to measure is prism that actually gets measured. Removing the setup step removes the excuse for skipping it.

Readings the Operator Controls

With an external graduated scale and no processing stage, the value recorded comes directly from what the operator observes. Nothing needs configuring correctly beforehand for the reading to be trustworthy, and there is no setting that can quietly bias every measurement taken afterwards. For teaching, and for anyone who wants to understand rather than accept a figure, that transparency has real worth. Understanding a figure is a different thing from receiving one.

Simple, Compact and Long-Lasting

An upright column built from optics and graduated scales occupies modest bench space and has little that can fail in the way electronic assemblies do. Practices that value equipment continuing to work predictably across many years, and that would rather not tie verification capability to a powered instrument, are well served by a design of this kind. A modest footprint also makes a second checking position realistic where bench space is tight.

Shuttle Lens to Ten Prism Dioptres

The shuttle lens measuring range covers 10 prism dioptres, graduated in single prism dioptre steps. Substantial prismatic corrections are measured directly, with no accessory needing to be fitted first.

Dioptric Range Across Fifty Dioptres

Measurement runs from minus 25D to plus 25D, covering the full span from strong minus through to strong plus prescriptions without the lens falling outside the instrument's compass.

Minimum Measuring Value of 0.125D

The finest increment listed for the instrument is 0.125D, which sets the resolution at which a reading can be taken and recorded across the dioptric range.

Eyepiece Focusing Across Ten Dioptres

The eyepiece focusing range is plus or minus 5D, so each operator sets the instrument to their own eye. Shared instruments otherwise stay on whichever setting was last used.

Single Degree Axial Graduation

The cylinder lens axial range covers 0 to 180 degrees with an axial value of 1 degree, recording cylinder orientation across the full sweep in single degree steps.

Wide Field of Vision

A wide observation field assists viewing of the target, which lightens the work of sustained checking and helps particularly when working at the smaller end of the diameter range.

Lenses to One Hundred Millimetres

The maximum diameter of measured lenses is 100mm, accommodating the generously sized lenses that modern frame shapes and uncut blanks frequently present.

Compensation Prism Available

A compensation prism is listed as available for the instrument. What range it extends the prismatic measurement to is not stated, so that detail is worth establishing directly.

The LINK HLM-200 outer reading focimeter measures finished lenses optically, with the value taken from a graduated external scale on an upright column. Dioptric power runs from minus 25D to plus 25D at a minimum measuring value of 0.125D, the cylinder lens axial range covers 0 to 180 degrees in single degree steps, and the eyepiece focuses across plus or minus 5D to suit whoever is using it. A wide field of vision assists observation throughout.

The shuttle lens measures across 10 prism dioptres in single prism dioptre graduations, which is a generous prismatic range to have available directly, and lenses of up to 100mm in diameter are accepted. A compensation prism is listed as available. Because the manufacturer specification for this model omits overall dimensions, weight, and the range the compensation prism reaches, we would rather flag those gaps than fill them with figures taken from elsewhere. Ask Medigear.uk to confirm them alongside lamp and supply arrangements, certification status, condition, available options and reseller and listing rights for the manufacturer trademark. An optical instrument of this type holds its usefulness for many years, so establishing the exact configuration at the outset is time well spent. Talk to Medigear.uk, a verified medical equipment supplier, and we will establish exactly what a given instrument provides before you commit.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

The shuttle lens measuring range is 10 prism dioptres, graduated in single prism dioptre steps. That range is available directly, with no accessory needing to be fitted, which makes prismatic checking part of the ordinary routine. A compensation prism is separately listed as available for the instrument. What range that accessory extends measurement to is not stated in the documentation supplied, so it is worth establishing directly.

Measurement runs from minus 25D to plus 25D, spanning strong minus through to strong plus prescriptions. The minimum measuring value listed is 0.125D, which sets the finest increment at which a reading is taken across that range. A span of fifty dioptres in total means very few finished lenses fall outside what the instrument will read, including the stronger prescriptions that arise in specialist work.

The cylinder lens axial range covers 0 to 180 degrees, with an axial value of 1 degree. Orientation is therefore recorded across the full sweep in single degree steps, which matches the precision at which cylinder axis is normally prescribed and dispensed. Recording orientation properly matters as much as power, since a correct cylinder on the wrong axis performs poorly for the wearer.

The eyepiece focusing range is plus or minus 5D. Each operator focuses to their own eye before working, which matters wherever an instrument passes between several people or where the person using it wears their own correction. Resetting takes only a moment before a session begins.

The maximum diameter of measured lenses is 100mm. That accommodates the larger shapes common in modern frames as well as uncut blanks, and the wide field of vision assists viewing of the target across the range of sizes.

The operator sights the target through the eyepiece and reads the value from graduations on the instrument body. The measurement is optical throughout, so what gets recorded reflects the optics and the observer without any interpretation applied in between. Alignment is a skill that comes quickly with practice, and once learned it transfers to any instrument of similar type.

An illuminating lamp is fitted, and the specification lists both mains and low voltage direct current arrangements. We have deliberately not published the supply figures, as the correct arrangement for use in your setting is something Medigear.uk should confirm rather than something to take from a datasheet.

The manufacturer specification for this model does not state overall size or weight. Rather than publish figures we cannot verify from the documentation supplied, we would ask you to confirm both with Medigear.uk, particularly if bench space is a constraint where the instrument will sit.