Method for analysing a spray generated by a device for dispensing fluid pharmaceutical product

A method of analyzing a spray generated by a spray device for spraying pharmaceutical fluid, the method comprising the following steps:

• providing a spray head of a spray device for spraying pharmaceutical fluid, said spray head including a spray orifice;
• causing a test fluid to pass through said spray head towards said spray orifice, said test fluid being air at a temperature that is different from ambient temperature;
• displaying, by strioscopy, the flow of test fluid leaving said spray orifice;
• and
• determining whether or not the test-fluid spray coming from said spray head complies with predetermined specifications based on information from said display of the test-fluid flow;
• and
• wherein a complete cycle comprises following steps:
• a plate supporting a spray head is moved to place a spray head in the analyzing device;
• once the plate supporting the spray head has stopped, a request for the acquisition of a reference images is made;
• one reference image is taken before the air flow generator is actuated;
• after that first reference image without air flow has been taken, the air flow generator is actuated;
• once the air flow generator generates a stationary air flow, two reference images are taken;
• these two reference images are then superimposed with the first reference image taken without air flow, and an image processing step is started;
• after the image processing, the images are displayed.