What Is Laser Scanning Confocal Microscopy?
Laser Scanning Confocal Microscopy uses a focused laser to scan the surface of a sample. The confocal pinholes capture only the in-focus surface, thereby enabling the construction of full 3D surface maps. Laser Scanning Confocal Microscopy may also be referred to as VK or VK-X, after the popular Keyence VK (instrument family).
LSCM stands out because it is a non-contact and non-destructive technique that can map the “XY” dimensions and the “Z” height of small features. Laser confocal microscopes combine 2D white-light optical imaging with 3D laser confocal imaging. The Keyence VKX-1100 microscope overlays optimal microscope images with the 3D surface profile for clear imaging of the step heights and surface roughness of small features. Additionally, this instrument is well-suited to examine micron-scale thicknesses of semi-transparent layers and air gaps.
Material Range
High Resolution
Fast Scanning
Why Use LSCM?
LSCM is ideal for quick, precise surface profiling when minimal or no sample preparation is required. It delivers high-resolution 3D maps to measure step height, roughness, and film thickness across many material types. Because it’s non-destructive and contact-free, it preserves delicate or polished surfaces while maintaining dimensional accuracy. This makes it essential for semiconductors, materials science, biomedical devices, and precision manufacturing, where surface quality and consistency matter most.
Quick Results
No Prep Needed
Reliable Data
How Laser Scanning Confocal Microscopy Works
For Laser Scanning Confocal Microscopy, a laser source beam is passed through a set of optics with narrow pinholes. These pinholes provide a very shallow depth of field such that only light that is reflected from near the exact focal plane of the final lens will reach the detector.
The microscope captures a series of vertical slices (in z-dimension) to build up a 3-dimensional profile at the illuminated beam spot. By scanning this spot in a raster pattern laterally (in the x-y plane), the system generates an image profile of the sample surface topography.
Nanometer-scale resolution can be achieved, depending on the focusing lens used for the measurement.
Equipment Used for LSCM
Keyence VKX-1100 Microscope
- Lateral Scan Range: 100 mm x 100 mm.
- Vertical Stage Range: 70 mm.
- Lateral Resolution: < 1 µm.
- Vertical Resolution: < 1 µm (nm-scale possible in some cases).
- Magnification Limit: up to 28,800x.
Key Differentiators
Laser Scanning Confocal Microscopy (LSCM) delivers precise, high-resolution 3D surface mapping without touching or damaging the sample. Covalent’s LSCM stands out for its speed, accuracy, and versatility, capturing detailed topography across metals, ceramics, and polymers with little to no sample prep.
Strengths
- Rapid 3D profile surfaces.
- Non-contact, non-destructive.
- Usually, no sample preparation is required.
- Step heights, profiling small features, surface roughness.
- Measures micron-range features.
- Works with various materials.
Limitations
- For some samples, we need to use Covalent’s alternate optical profilometry or electron microscopy techniques for better results.
Example Outputs
Sample Requirements
Samples are typically solids at room temperature. Additional capabilities can allow for heating small samples. If the surface of interest is very transparent and thin, it may be necessary to apply a coating to improve optical reflection at low magnifications.
LSCM Applications by Industry
Semiconductor
Surface inspection of wafers and ICs, quality control, defect examination, deposition measurement, photolithography, and etching.
Microfabricated Devices & Patterned Surfaces
Surface topography, critical dimension measurement, coplanarity, and feature flatness.
Materials Science & Optics
Grain‑structure imaging, sizing, and pattern profiling.
Precision Manufacturing & Metrology
Surface finish, roughness, and dimensioning.
Techniques That Complement LSCM
LSCM is a method with various benefits. Depending on your needs, we recommend using it alongside our other techniques for more tailored results.
Why Choose Covalent for Your LSCM Needs?
Covalent offers quick turnaround and a broad suite of profilometry tools: LSCM, WLI, AFM, CWL/VR, SEM, SAM, and micro‑CT. These tools are applied by an expert team that selects the right modality and settings for your surface, scale, and tolerance targets.
We deliver quantitative, manufacturing‑ready results: traceable step heights, roughness, stitched 3D maps, and clean data packages. If you prefer a hands‑on approach, you can also schedule a live session to direct regions of interest in real time while we capture the features you care about.