Detailed LDR20K1 Specifications
The technical material below is retained for this model only. Do not transfer a range, pulse, interface, mechanical or safety value from another 1064 nm product.
Specifications
The tables below retain the supplied model record except for entries explicitly withheld after a comparison with the current model PDF. A value, option or condition from another model is not interchangeable. General explanations are separated from model-specific entries.
Source-review note
The old range and code-accuracy summary contains unsupported qualifiers. The current document also has a TTL/RS422 interface-title inconsistency; those terms must not be treated as interchangeable. The old outline image with malformed annotation is withdrawn.
Current LDR20K1 document — source checked 13 September 2026. On a small screen, swipe wide tables horizontally to read every column.
|
Operating modes |
Ranging, designation |
|---|---|
|
Pump source |
Diode array |
|
Operating wavelength |
1.064 μm (1064 nm) |
|
Pulse energy |
≥ 20 mJ |
|
Pulse energy stability |
Within a single designation cycle, single-pulse energy deviation ≤ ±10% (after 2 s of emission) |
|
Beam divergence |
≤ 0.6 mrad |
|
Pulse width |
10 ns ± 5 ns |
|
Laser optical-axis stability |
≤ 0.05 mrad |
|
Ranging performance |
|
|
Ranging frequency |
1 Hz / 5 Hz / single-shot |
|
Continuous ranging |
1 Hz: ≥ 5 min; 5 Hz: ≥ 1 min |
| Measurement range | Withheld pending a corrected, controlled model specification. See the source-review note above. |
|
Ranging accuracy |
±1 m |
|
Detection rate |
≥ 98% |
|
Dimensions |
≤ 92 mm × 67 mm × 53 mm |
|
Weight |
≤ 290 g |
|
Designation performance |
|
| Laser code accuracy | Withheld pending a corrected, controlled model specification. See the source-review note above. |
|
Designation frequency |
20 Hz fundamental (supports user-defined coding) |
|
Environmental Adaptability |
|
|
Operating temp |
–40°C to +55°C |
|
Storage temp |
–45°C to +70°C |
| Pin No. | Signal Name | Description |
|---|---|---|
|
1 |
Vin |
Power supply +(24V) |
|
2 |
Vin |
Power supply +(24V) |
|
3 |
GND |
Power return (–) |
|
4 |
GND |
Power return (–) |
|
5 |
RX1+ |
Host Computer -> Laser Range & Illumination Unit (422-RX+) |
|
6 |
RX1- |
Host Computer -> Laser Range & Illumination Unit (422-RX-) |
|
7 |
TX1- |
Laser Range & Illumination Unit -> Host Computer (422-TX-) |
|
8 |
TX1+ |
Laser Range & Illumination Unit -> Host Computer (422-TX+) |
|
External Trigger |
||
|
1 |
TBI |
External Trigger + (Rising edge trigger) |
|
2 |
TBG |
External Trigger - |
Technical drawings
Evidence status: published data is not a substitute for the ordered revision, a serial-number test report or a laser-classification report. A standard mentioned in a table is not proof of third-party certification.
Model-specific conditions and limits
Conditions are retained only when the source states them. They are not reconstructed from a nominal range or wavelength.
Operating conditions
Read the value together with its qualifier
A minimum, maximum, typical value and tolerance are different kinds of statement. “≥” is a lower bound and “≤” is an upper bound; neither is an exact measurement. A nominal value without tolerance does not establish a tolerance. Preserve the units and the condition printed beside every entry.
Keep operating modes separate
If the original table lists more than one operating mode, each rate, duration and stability statement belongs to its stated mode. This page does not combine the most favorable entries into a new operating specification. A published duration is not evidence of unrestricted continuous operation.
Environment and document revision
Storage limits describe a non-operating condition and must not be substituted for powered-operation limits. A test-standard name without the method, severity, configuration and outcome is an incomplete qualification record. Request the relevant report for the exact supplied revision; do not describe a reference to a standard as a blanket certification.
Safety review
1064 nm is outside normal visual perception. A beam that cannot be seen can still be hazardous; brightness or a camera image is not a safety measurement. Laser safety assessment must address the complete product and its accessible emission, not only the source wavelength. IEC 60825-1:2014 — Safety of laser products; FDA — Frequently Asked Questions About Lasers.
Pulsed Time-of-Flight Ranging
Technical principle
Laser emission: a high-level overview
A laser combines an energized gain medium with optical feedback to produce stimulated emission. Solid-state lasers use a solid host for the active species. The wavelength name alone does not identify a particular host material, pump wavelength or cavity construction, so this page does not infer those internal parts for LDR20K1. FDA — Frequently Asked Questions About Lasers.
What a pulsed-source specification describes
Pulse energy describes energy in one optical pulse. Pulse duration describes its temporal extent under a stated width convention. Repetition rate describes how often pulses occur. These quantities must not be substituted for each other: an energy specification is not a power specification, and a rate does not describe a waveform. Electrical input power and optical output also refer to different quantities.
Beam size and angular spread are different measurements
A beam diameter applies at a specified measurement plane. Divergence describes angular spreading rather than diameter at one location. Different width definitions and full-angle versus half-angle conventions can give different numerical descriptions of the same beam. Where the model record does not identify its convention, the comparison remains incomplete. ISO 11146-1:2021 — Beam-width, divergence and propagation measurement terminology.
Accuracy, resolution and stability are separate terms
Resolution describes the reported increment or discrimination scale; accuracy concerns the difference between a measurement and a reference. Stability concerns variation over an interval or set of conditions. A small displayed increment does not by itself establish small error, and one stability metric does not establish another. The original table’s labels and qualifiers remain important even when two entries share a numerical value.
Physical explanation versus product evidence
A scientific paper can explain a phenomenon without testing this product. Its measured output, material recipe, internal geometry or performance cannot be transferred to LDR20K1. A manufacturer's published record, a unit test, a qualification report and an independent standard each answer a different question. The references below are explicitly identified by that role.
Invisible radiation and responsible documentation
Eye and skin hazards depend on exposure, not on whether an observer sees a spot. A product page is not a safe operating procedure. Applicable controls and personnel responsibilities require a qualified safety review, and the product must retain its warnings and approved instructions. OSHA — Laser Hazards.
Pulse energy describes emitted energy per pulse; its effect cannot be separated from pulse width, divergence, optical losses, receiver threshold and the stated target/atmosphere conditions. It is not a substitute for a model-specific near- or long-range acceptance test.
Source-stated application context
Application labels indicate evaluation context, not automatic fitness for a finished system.
For a source-and-package comparison, the retained LDR20K1 table specifies a divergence limit of 0.6 mrad and an enclosure bounded by 92 × 67 × 53 mm. It separately lists 1 Hz, 5 Hz and single-shot ranging entries. These are distinct recorded quantities; none supplies the missing, qualified measurement-distance specification.
The current page is a model reference for reviewing optical and mechanical requirements. Its ±1 m ranging-accuracy entry must stay separate from maximum distance and environmental qualification. General beam terminology helps interpret the optical table, while the supplied model document remains the authority for any product-specific acceptance condition.
Confirm short- and long-distance acceptance conditions
- Define minimum distance, target material, reflectance, size and incidence angle.
- Check receiver recovery, optical-axis overlap and strong-return handling at the intended near limit.
- Verify supply tolerance, peak current, grounding, interface levels, connector and timing with the ordered revision.
- For long-distance acceptance, state target geometry, visibility, weather, background and required detection probability.
- Test with the installed window, boresight, field of view, enclosure and thermal path rather than a bare module alone.
- Evaluate accessible emission, labels and failure conditions again for the finished laser product under IEC 60825-1.
Questions to resolve before design release
What optical energy is documented for LDR20K1?
The retained model table states ≥20 mJ pulse energy at 1.064 µm, also written as 1064 nm. These entries identify the source class. They do not resolve the current page’s withheld measurement-range field or validate a new application-specific distance claim.
What makes the LDR20K1 package distinct?
The current table lists mass ≤290 g and dimensions ≤92 × 67 × 53 mm. These are the model’s documented envelope limits. A different product’s drawing or enclosure dimensions cannot be used to fill missing LDR20K1 mechanical or acceptance details.
Can a maximum ranging distance be advertised for LDR20K1?
The current public record withholds the measurement-range entry pending a corrected controlled specification. This page does not recover a distance from the model number, historical text or a different product. The separately recorded accuracy value is not a substitute for that missing range qualification.
What optical pulse duration is recorded for LDR20K1?
Its table gives 10 ns ±5 ns for pulse width. The tolerance is part of the published entry and should accompany the central value. It does not establish an unstated FWHM convention or an optical-duration value for another model.
Is 1064 nm an eye-safe classification?
No. The 1064 nm figure is a wavelength, not a laser safety class or permission for direct viewing. The applicable equipment classification and accessible-emission evidence must be assessed for the actual configuration; a general safety standard does not certify this individual model.
Product evidence and general technical context
The model PDF controls model claims. Public references below explain general engineering principles only.
- LDR20K1 controlled model datasheetModel identity and the product-specific values and qualifications discussed on this page.
- ISO 11146-1:2021 — laser beam measurementDefinitions and measurement methods for beam width, divergence and propagation ratio; not an ERDI model test report.