Line Ruler-Line Ruler-Ningbo Zhixing Optical Technology Co., Ltd.

Line Ruler

Product Series：Line Ruler

Comprehensive Material & Specification Selection Library ：

Diverse substrates, extensive size/thickness coverage, and customizable coatings.

Sub-100 nm Position Accuracy (Position Accuracy < 100 nm) ：

Tailored for high-end semiconductor inspection and precision metrology, Zhixing Optics pushes the boundaries of physical fabrication. Leveraging a laser direct writing system with 3-sigma < 50 nm, we strictly control the relative positional error between feature points to within 100 nm.

Ultra-High Resolution Fabrication Capability (Feature Size < 500 nm) ：

Capable of fabricating minimum feature sizes below 500 nm with exceptionally smooth pattern edges. This ensures that feature edges remain crisp and burr-free even under high-magnification objectives or high-pixel sensors, significantly enhancing the stability and accuracy of centroid localization algorithms.

Closed-Loop Comprehensive Solution Support ：

Expert-level selection guidance Full-chain engineering implementation High-precision fixture support Full-parameter performance verification

Material Overview
customization capability
Product Specifications
Usage

Material Overview	K9 Glass	B270 Glass	Fused Silica	Soda-Lime Glass
Advantages	• High surface flatness and excellent surface figure accuracy • >90% light transmittance; suitable for transmission calibration • Sharp and smooth pattern edges; easily achieves micron and sub-micron precision • Clear imaging	• High surface flatness and excellent surface figure accuracy • >90% light transmittance; suitable for transmission calibration • Sharp and smooth pattern edges; easily achieves micron and sub-micron precision • Clear imaging	• High surface flatness and excellent surface figure accuracy • >90% light transmittance; suitable for transmission calibration • Sharp and smooth pattern edges; easily achieves micron and sub-micron precision • Clear imaging • Extremely low sensitivity to temperature and humidity variations	• High surface flatness and excellent surface figure accuracy • >90% light transmittance; suitable for transmission calibration • Sharp and smooth pattern edges; easily achieves micron and sub-micron precision • Clear imaging
Disadvantages	• Standard optical glass is brittle; prone to edge chipping and fracture upon impact • Front illumination causes glare/reflections	• Standard optical glass is brittle; prone to edge chipping and fracture upon impact • Front illumination causes glare/reflections	• Standard optical glass is brittle; prone to edge chipping and fracture upon impact • Front illumination causes glare/reflections	• Standard optical glass is brittle; prone to edge chipping and fracture upon impact • Front illumination causes glare/reflections
Surface Process	Chrome Plating	Chrome Plating	Chrome Plating	Chrome Plating
Substrate Thickness	2.3 mm (Tolerance: ±0.1 mm) 3 mm / 4.8 mm (Tolerance: ±0.2 mm) 7.8mm	2.3 mm (Tolerance: ±0.1 mm) 3 mm / 4.8 mm (Tolerance: ±0.2 mm) 7.8mm	2.3 mm (Tolerance: ±0.1 mm) 3 mm / 4.8 mm (Tolerance: ±0.2 mm) 7.8mm	2.3 mm (Tolerance: ±0.1 mm) 3 mm / 4.8 mm (Tolerance: ±0.2 mm) 7.8mm
Surface Roughness (Ra)	≤0.05 μm (Mirror Grade)	≤0.05 μm (Mirror Grade)	≤0.05 μm (Mirror Grade)	≤0.05 μm (Mirror Grade)
Visible Light Transmittance	85%–95% (Transparent)	85%–95% (Transparent)	85%–95% (Transparent)	85%–95% (Transparent)
Coefficient of Thermal Expansion (CTE)	K9:7.1 × 10⁻⁶/℃	B270：9.4 × 10⁻⁶/℃	Fused Silica: 5.0–5.5 × 10⁻⁷/℃	Soda-Lime: 8.5–9.5 × 10⁻⁶/℃
Applicable Wavelength Range	UV Region: Only transmits near-UV (>350 nm); virtually opaque to deep UV (<300 nm). IR Region: IR cutoff at 2100–2200 nm; transmittance drops rapidly beyond this range. Visible Region (400–760 nm): Good transmittance.	UV Region Only transmits long-wave near-UV (>330 nm); virtually opaque below 300 nm. UV cutoff shifts toward longer wavelengths as thickness increases. Not suitable for UVB or deep-UV detection. IR Region: IR cutoff ~3050 nm. High and stable transmittance in the 780–2500 nm NIR band; gradual attenuation above 2500 nm. Visible Region (400–760 nm) Low-iron composition eliminates greenish tint; average visible transmittance 91%–92%.	UV Region: Transmits deep UV (down to 185 nm); ideal for UV light sources, lithography, and UV inspection. IR Region: Furthest IR cutoff (~3500 nm); higher and more stable NIR transmittance. Visible Region (400–760 nm): Slightly higher transmittance and lower dispersion.	UV Region: Earliest UV cutoff (~360 nm); essentially unsuitable for UV applications. IR Region: IR cutoff at 2100–2200 nm; transmittance drops rapidly beyond this range. Visible Region (400–760 nm): Good transmittance.
Hardness & Scratch Resistance	Mohs 5.5–6; Prone to scratching	Mohs 5.5–6; Prone to scratching	Mohs 5.5–6; Prone to scratching	Mohs 5.5–6; Prone to scratching
Optical Path Compatibility	Transmission + Reflection	Transmission + Reflection	Transmission + Reflection	Transmission + Reflection
Typical Applications	High-precision lab calibration, microscopic vision, transmission calibration	High-precision lab calibration, microscopic vision, transmission calibration	High-precision lab calibration, microscopic vision, transmission calibration	High-precision lab calibration, microscopic vision, transmission calibration

I. Environmental Preparation & Temperature Stabilization (Critical Step)

Strict Temperature Control: All operations must be conducted in a temperature-controlled laboratory.

Thermal Equilibration: Before use, the line scale must be removed from its packaging and placed on the measurement surface plate for several hours. This allows it to reach complete thermal equilibrium with both the environment and the equipment under test, eliminating minute length variations caused by thermal stress.

II. Installation & Alignment

Face-Down Placement: Place the line scale with the graduated side facing down (in optical contact) on the worktable. This minimizes Abbe error to the greatest extent possible.

Axis Alignment: Adjust the fixture or worktable so that the longitudinal axis of the line scale is strictly parallel to the direction of travel of the instrument's guide rail.

Focusing: Adjust the objective lens of the reading microscope or vision system until the edges of the graduations appear as sharp as possible within the eyepiece field of view.

III. Line Alignment & Reading (Taking Calibration/Verification as an Example)

Initial Zeroing: Move the worktable to precisely align the "0" graduation of the line scale with the reference mark on the microscope's reticle (or the crosshair in the imaging software), and record this as the first instrument reading.

Target Alignment: Smoothly move the worktable in a single direction (to avoid backlash error) until the target graduation (e.g., at 100 mm) is aligned with the reticle, and record this as the second instrument reading.

Error Calculation: Compare this measured value against the certified standard value of the line scale (as stated in the factory calibration certificate). The difference represents the indication error of the length-measuring instrument, which can then be linearly compensated for in the software.

IV. Strict Operational Prohibitions

Never Touch the Graduated Area: Always wear gloves or hold the line scale by both ends when handling. Skin oils and sweat will directly corrode the metallic chromium coating or introduce micron-level dust particles.

Unidirectional Cleaning Only: If there are stains on the scale surface, gently wipe them in one direction only using an absorbent cotton ball moistened with absolute ethanol. Never rub back and forth repeatedly, as this will wear down the edges of the graduations.

Handle with Extreme Care: Glass line scales are extremely fragile. Any impact or bump can cause chipping of the graduation edges or fracture of the scale body, rendering it completely unusable.

Home

About Us

About Us

Products

Products

Contact Us

Contact Us

Line Ruler

Quick Link

Product category

Contact Us