Fixed Focus Camera Module

1. Requirement Definition & Design Stage
This stage clarifies the module’s application scenarios and technical indicators, laying the foundation for subsequent development:
Requirement Analysis: Confirm core needs based on the target product (e.g., children’s toy cameras need low cost/small size; industrial detection cameras need anti-interference/clear outline imaging). Define key parameters: resolution (e.g., 2MP/5MP), focal length (fixed to target shooting distance), interface type (e.g., DVP/MIPI), and environmental adaptability (e.g., temperature range for toys: 0-40°C).
Optical Design: Select matching lens (fixed focal length, low distortion) and image sensor (e.g., CMOS for low power consumption). Calculate the lens-sensor distance to fix the focal point (ensuring clear imaging at the target distance, no manual adjustment needed).
Structural & Circuit Design: Design the module’s shell (fit the target product’s size) and PCB (layout of sensor, driver chip, and interface). Develop driver programs (match the interface protocol, ensure normal data transmission between the module and the main board).
 

2. Prototype Development & Verification
Turn design plans into physical samples and verify feasibility:
Prototype Fabrication: Purchase sample components (lens, sensor, PCB), assemble the first prototype (manual soldering of key components, lens bonding).
Preliminary Testing: Test optical performance (check if the fixed focal point meets requirements, e.g., clear imaging at 30-50cm for toy cameras) and electrical functions (whether the module can output images normally via the interface, no stuck/garbled screens).
Design Iteration: Adjust the lens position, PCB layout, or driver code based on test issues (e.g., if imaging is blurry, optimize the lens-sensor bonding accuracy).
 

3. Supply Chain Preparation & Incoming Quality Control (IQC)
Ensure stable supply of mass-produced components and eliminate defective materials:
Supplier Selection: Screen qualified suppliers for lenses, sensors, PCBs, etc. (verify their production capacity and quality certificates, e.g., ISO 9001).
Incoming Inspection: Check 100% of incoming components:
Optical parts (lens surface scratches, transmittance);
Electronic parts (sensor pixel defects, PCB short circuits);
Reject unqualified batches (e.g., lenses with bubbles).
 

4. Mass Production Line Setup & Process Standardization
Prepare for large-scale production:
Production Line Construction: Deploy equipment (SMT machines for PCB component mounting, automatic lens bonding machines, testing jigs).
Process Standardization: Formulate operating guidelines (e.g., SMT soldering temperature: 220-240°C, lens bonding pressure: 5N) and QC standards (e.g., "imaging clarity must reach ≥80% of the design standard").
Staff Training: Train operators on equipment operation and defect identification (e.g., how to spot misaligned lenses).
 

5. Mass Production & In-line Testing
Execute large-scale assembly and real-time quality monitoring:
Component Mounting: Use SMT machines to attach driver chips, resistors, and capacitors to PCBs; then manually or automatically bond the sensor and fixed-focus lens to the PCB.
Module Calibration: For fixed focus, use calibration jigs to confirm the lens position (ensure the focal point is fixed at the target distance, no deviation).
In-line Testing: Test each module after assembly:
Functional test (connect to the main board, check if images are output normally, no color cast);
Optical test (use test charts to verify imaging sharpness);
Appearance test (check for shell scratches, component misalignment).
 

6. Final Quality Assurance (QA) & Reliability Testing
Conduct batch sampling and long-term performance verification:
Batch Sampling Inspection: Randomly sample 3-5% of modules from each production batch for retesting (recheck focal accuracy, interface stability).
Reliability Testing: Test sampled modules under simulated working environments:
High/low temperature test (e.g., -10-60°C for industrial modules, 0-40°C for toy modules) to check if imaging is stable;
Vibration test (simulate transportation) to ensure parts do not fall off.
Defect Analysis & Improvement: If defective products are found (e.g., imaging blur after high-temperature test), trace the root cause (e.g., lens adhesive failure) and adjust the production process (replace high-temperature-resistant adhesive).
 

7. Packaging, Outgoing Inspection (OQC) & Shipment
Ensure products are protected during transportation and meet delivery requirements:
Packaging: Use anti-static bags (prevent electrostatic damage to electronic components) and cartons with foam (shockproof) to package modules; mark batch numbers and specifications on the outer box.
Outgoing Inspection (OQC): Check the packaged products:
Quantity verification (match the delivery order);
Package integrity (no damage to cartons/bags);
Randomly open boxes to recheck module appearance/function.
Shipment & Documentation: Arrange logistics (e.g., express for small batches, freight for large batches); provide supporting documents (QC report, delivery note, component certification) to the customer.